MESON Chess Problem Database

Problem Display
PID: 64586 (2nQ4/pK6/2PpP1Nb/2PkPBp1/1p6/4P3/3N4/2R4b w - - 0 1)

Vahlakov, Yuri Nikoleyevich

3rd Prize, Shakhmaty v SSSR, 1980

2nQ4/pK6/2PpP1Nb/2PkPBp1/1p6/4P3/3N4/2R4b

#2

11 + 8

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Qxd6#
    • 1...Se7
      • 2.Qxd6#
  • Tries
    • 1.Se7+?
      • 1...Sxe7
        • 2.Qxd6#
      • 1...Kxe5!
    • 1.Be4+?
      • 1...Kxe6
        • 2.Qf6#
        • 2.Qd7#
        • 2.Qg8#
      • 1...Bxe4!
    • 1.Qa5?
      • threat
        • 2.cxd6#
      • 1...dxc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...dxe5!
    • 1.cxd6?
      • threat
        • 2.Qa5#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...a5
        • 2.Qxa5#
      • 1...Sb6!
    • 1.e7?
      • threat
        • 2.Qg8#
      • 1...Sxe7
        • 2.Qxd6#
      • 1...Bf8!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Bb3#
      • 1...Kxc5
        • 2.Qa5#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Sb6
        • 2.Qxd6#
      • 1...b3
        • 2.Bxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD::QAR1(K),XP(e)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • S(h);XS(I)::QAR1(K),XP(e)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT,P_PINP(G),XP(E)
    • Try
      • B(F);CHECK
      • Refutation
        • B(a);XB(F)
    • Try
      • Q(K);N_PINP(e)
      • Threat
        • QAR(K)+P(D),XP(e)
      • Refutation
        • P(e);XP(E)
    • Try
      • P(D);XP(e)
      • Threat
        • QAR(K)
      • Vars
        • S(h);CHECK,OGATE,P_SPINS(h),XP(D)::QAR1(K),XS(h)
        • P(g);::QAR(K),XP(g)
      • Refutation
        • S(h);
    • Try
      • P(H);
      • Threat
        • QAB(K)
      • Vars
        • S(h);N_GUARD,XP(H)::QAR1(K),XP(e)
      • Refutation
        • B(f);
  • Actual
    • B(F);
    • Threat
      • B(F)
    • Vars
      • K(c);N_SPINP(e),OGATEB,P-FLIGHT,P_PINP(G),XP(D)::QAR2(K)
      • K(c);N_SPINP(e),OGATEB,P_PINP(G),S_FLIGHT,XP(H)::QAB(K)
      • S(h);N_GUARD::QAR1(K),XP(e)
      • P(b);::B(F),XP(b)
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