MESON Chess Problem Database

Problem Display
PID: 283878 (4B3/3Q4/3P1pN1/3p1P2/4k3/4p3/2P3R1/4K3 w - - 0 1)

Koshel, Mikhail Igorevich

Shakhmatnaya kompozitsiya, 2025

4B3/3Q4/3P1pN1/3p1P2/4k3/4p3/2P3R1/4K3

#2

8 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Ke2?
      • threat
        • 2.Rg4#
      • 1...d4
        • 2.Qe6#
      • 1...Kd4!
    • 1.Qa4+?
      • 1...Kf3
        • 2.Sh4#
        • 2.Qg4#
      • 1...Kxf5
        • 2.Bd7#
        • 2.Qg4#
      • 1...d4!
    • 1.Qc6?
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kd4
        • 2.Rg4#
      • 1...Kxf5
        • 2.Qxd5#
      • 1...e2!
    • 1.Qe6+?
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kd4!
    • 1.Qb7?
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kxf5
        • 2.Qxd5#
      • 1...e2!
  • Keys
    • 1.Qb5!
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kxf5
        • 2.Qxd5#
      • 1...e2
        • 2.Qd3#
      • 1...d4
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • R(C)
      • Vars
        • P(c);SBLOCK::QAR2(G)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(G);P_PINP(c)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(G),XP(c)
        • K(b);N_GUARD,N_SPINP(c),P-FLIGHT::R(C)
        • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XP(D)::QAR2(G),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(G),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(G);P_PINP(c)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(G),XP(c)
        • K(b);N_GUARD,N_SPINP(c),P-FLIGHT,S_CUTP(c)::QAR2(G)
        • K(b);N_GUARD,N_SPINP(c),S_FLIGHT,XP(D)::QAR2(G),XP(c)
      • Refutation
        • P(a);
  • Actual
    • Q(G);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB(G),XP(c)
      • K(b);N_GUARD,P-FLIGHT,S_CUTP(c)::QAR2(G)
      • K(b);N_GUARD,P_SPINP(c),S_FLIGHT,XP(D)::QAR2(G),XP(c)
      • P(a);::QAB1(G)
      • P(c);OGATEB,SBLOCK::B(H)
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