MESON Chess Problem Database

Problem Display
PID: 282902 (4N3/1Q6/6P1/3PpP2/2p1k3/2P1B3/B2P4/5KR1 w - - 0 1)

Koshel, Mikhail Igorevich

Shakhmatnaya kompozitsiya, 2025

4N3/1Q6/6P1/3PpP2/2p1k3/2P1B3/B2P4/5KR1

#2

11 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Bb1#
      • 2.Qb1#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Bb1#
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kxf5!
    • 1.Sd6+?
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kf3!
    • 1.Sg7?
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kf3!
    • 1.Rg3?
      • threat
        • 2.Bb1#
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kxf5!
    • 1.Rg4+?
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kxf5
        • 2.Qc8#
        • 2.Qd7#
      • 1...Kf3!
    • 1.Rg5?
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kf3!
    • 1.Qc8?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kxd5
        • 2.Qb7#
        • 2.Qxc4#
        • 2.Qa8#
      • 1...Kf3!
    • 1.Qb1+?
      • 1...Kxd5
        • 2.Qb7#
      • 1...Kf3!
    • 1.Qd7?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf3!
    • 1.Qe7?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Kf3!
    • 1.Qf7?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf3!
    • 1.Qg7?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Kf3!
    • 1.d6+?
      • 1...Kd3
        • 2.Bb1#
        • 2.Qb1#
      • 1...Kxf5!
  • Keys
    • 1.Qh7!
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf3
        • 2.Qh1#
      • 1...Kxd5
        • 2.Qb7#
      • 1...Kxf5
        • 2.g7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • B(C)
      • Refutation
        • K(b);S_FLIGHT,XP(H)
    • Try
      • S(K);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(K);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • B(C)
      • Refutation
        • K(b);S_FLIGHT,XP(H)
    • Try
      • R(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • K(b);OGATEB,P_SPINP(a),S_FLIGHT,XP(G)::QAB(J)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);P_PINP(c)
      • Vars
        • K(b);N_GUARD,N_SPINP(c),S_FLIGHT::B(C)
        • K(b);N_SPINP(c),OGATEB,P_SPINP(a),S_FLIGHT,XP(G)::QAB(J)
        • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XP(H)::S(K)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(C)
        • K(b);OGATEB,P_SPINP(a),S_FLIGHT,XP(G)::QAB(J)
        • K(b);N_GUARD,S_FLIGHT,XP(H)::S(K)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(G);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(H)
  • Actual
    • Q(J);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::B(C)
      • K(b);N_GUARD,S_FLIGHT::QAB(J)
      • K(b);OGATEB,P_SPINP(a),S_FLIGHT,XP(G)::QAB(J)
      • K(b);S_FLIGHT,XP(H)::QAB(J)+P(I)
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