MESON Chess Problem Database

Problem Display
PID: 37068 (1K6/1P2p3/Q1P5/2k1BN1R/p1r1PP2/p3P3/B7/2r5 w - - 0 1)

Kopaev, Viacheslav Georgievich

2nd Prize, Shakhmatny Vestnik, 1993

1K6/1P2p3/Q1P5/2k1BN1R/p1r1PP2/p3P3/B7/2r5

#2

11 + 6

3705 Album Russia (1992-1994) 2000
3681 FIDE Album (1992-1994) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qb6#
    • 1...e6
      • 2.Bd6#
  • Tries
    • 1.Ka7?
      • threat
        • 2.Qb6#
      • 1...Kb4
        • 2.Qb6#
      • 1...Rb1
        • 2.Qxc4#
      • 1...Rb4!
    • 1.Kc7?
      • threat
        • 2.Qa5#
        • 2.Qb6#
      • 1...Kb4
        • 2.Qb6#
      • 1...Rb1
        • 2.Qxc4#
      • 1...Rb4!
    • 1.Sxe7?
      • threat
        • 2.Qa5#
      • 1...Kb4
        • 2.Qb6#
      • 1...Rb4
        • 2.Bc7#
      • 1...Rb1!
    • 1.Bd4+?
      • 1...Kb4
        • 2.Qb6#
      • 1...Rxd4!
    • 1.Qxc4+?
      • 1...Kb6
        • 2.Bc7#
      • 1...Rxc4!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Qb6#
      • 1...Kb4
        • 2.Qa5#
      • 1...Rb4
        • 2.Sxe7#
      • 1...Rb1
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::QAR2(H)
    • P(f);N_GUARD::B(E)
  • Tries
    • Try
      • K(K);S_FLIGHT
      • Threat
        • QAB1(H)
      • Vars
        • K(e);S_FLIGHT::QAR2(H)
        • R(a);N_GUARD::QAR1(H),XR(d)
      • Refutation
        • R(d);
    • Try
      • K(K);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P_PINP(I),S_FLIGHT::QAR2(H)
        • R(a);N_GUARD::QAR1(H),XR(d)
      • Refutation
        • R(d);
    • Try
      • S(F);XP(f)
      • Threat
        • QAR2(H)
      • Vars
        • K(e);S_FLIGHT::QAR2(H)
        • R(d);P_PINP(J),SBLOCK::R(G)+B(E)
      • Refutation
        • R(a);P_PINP(J)
    • Try
      • B(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR2(H)
      • Refutation
        • R(d);XB(E)
    • Try
      • Q(H);CHECK,XR(d)
      • Vars
        • K(e);S_FLIGHT::B(E)
      • Refutation
        • R(a);XQ(H)
  • Actual
    • B(E);
    • Threat
      • QAB1(H)
    • Vars
      • K(e);S_FLIGHT::QAB1(H)
      • R(d);P_PINP(J),SBLOCK::R(G)+S(F),XP(f)
      • R(a);N_GUARD,P_PINP(J)::QAR1(H),XR(d)
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