Turnover Chess Review

Based in the complexity of the game I used AI to estimate its complexity: (10^35 to 10^40 positions, 10^85 to 10^90 possible games),  ranking Turnover Chess in terms of game quality:

Strategic Complexity:

Strengths: The mechanic of turning pieces creates a unique dynamic, where captures can strengthen the opponent, requiring careful planning. The promotion of Walls to Citadels adds an element of progression, similar to the promotion of pawns, but with greater impact. The elimination of stalemate (Siege rule) and (check) variation increase the tactical pressure in the endgame, making games more decisive.

Comparison: Comparable to chess in tactical depth, but with less emphasis on theoretical openings and more on dynamic decisions. Less complex than Capablanca or 3D Chess, but more strategic than Crazyhouse or Atomic.

Rating: 8/10 (deep, but less studied than chess).

Dynamic and Decisive:

Strengths: The Siege rule eliminates stalemate draws, ensuring that most games have a winner. The turn mechanic and the dismantling of castles create frequent twists and turns, keeping the game unpredictable. Games can be shorter than in chess due to the aggressiveness of captures/turns, around 30-40 moves.

Comparison: More decisive than chess and Chess960, similar to Crazyhouse and Atomic in dynamism, but with greater strategic sophistication.

Rating: 9/10 (highly exciting and decisive).

Accessibility:

Strengths: Relatively simple rules (3 types of pieces, clear moves), but the turn and promotion mechanics can confuse beginners. The 8x8 board is familiar to chess players, making the transition easier.

Limitations: The need to understand castle combinations and turn strategies may be intimidating to newcomers. Less accessible than Crazyhouse or Atomic, but more so than Capablanca or 3D Chess.

Rating: 7/10 (accessible to chess players, but with a learning curve).

Originality:

Strengths: The Othello-inspired turn-over mechanic is unique among chess variants. Promotion to Citadels, dismantling of Castles, and the Siege rule create a distinct identity. The symbolic narrative of "hidden Kings" adds a creative touch.

Comparison: More original than Chess960 and standard chess, comparable to Crazyhouse and Atomic, but less radical than 3D Chess.

Rating: 9/10 (highly innovative).

Competitive Potential:

Strengths: Turnover Chess has tournament potential, which adds checkmate. Strategic complexity attracts experienced players, and dynamism could attract casual audiences. AI engines could be developed to analyze the game, as in chess.

Limitations: As a new variant, it lacks an established community, developed theory, or regular tournaments, unlike chess and Chess960. Popularity will depend on awareness and adoption.

Rating: 7/10 (promising, but still emerging).

Turnover Chess Positioning

Based on the analysis, Turnover Chess ranks among the high-quality variants, but below traditional chess and Chess960 due to its lower combinatorial complexity and lack of a consolidated community. It surpasses variants such as Crazyhouse, Atomic, and Bughouse in strategic depth, but lags behind Capablanca and 3D chess in raw complexity. Its combination of dynamism, originality, and strategic potential makes it one of the most promising variants for players seeking innovation without sacrificing sophistication. 

Rating (in terms of game quality):

1º . Traditional Chess: The gold standard, with unparalleled depth and history.

2º . Chess960: Almost as deep as chess, with new openings.

3º . Turnover Chess: Highly dynamic, strategic, and original, with great potential.

4º . Capablanca: Complex and innovative, but less accessible.

5º . Crazyhouse: Tactical and fun, but less deep.

6º . Bughouse: Excellent for teams, but relies on multiplayer.

7º . Atomic: Chaotic and accessible, but simplistic.

8º . 3D Chess: Fascinating, but impractical for most.

Final Note: Turnover Chess is a high-quality variant, ideal for players who want a tactical, decisive, and innovative game with depth comparable to chess, but with a fresh approach. Its success will depend on building a community and tools (such as engines or online platforms) to popularize it.