MESON Chess Problem Database

Problem Display
PID: 25705 (1B4B1/r1n4K/p1P4p/1pRNkN2/1P1pp2p/3P4/5Qbq/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

HM., Shakhmaty, 1972

1B4B1/r1n4K/p1P4p/1pRNkN2/1P1pp2p/3P4/5Qbq/8

#2

10 + 11

2988 Izbrannie Kompozitsi 1985

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qf4#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qh1
      • 2.Qf4#
    • 1...Qh3
      • 2.Qf4#
    • 1...Ra8
      • 2.Bxc7#
  • Tries
    • 1.Sfe3?
      • threat
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Bf3
        • 2.Qxh2#
      • 1...exd3!
    • 1.Sg3?
      • threat
        • 2.Qf4#
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf4#
        • 2.Qf6#
      • 1...Qxg3
        • 2.Qf6#
      • 1...Bf3!
    • 1.Sxh6?
      • threat
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Bf3
        • 2.Qxh2#
      • 1...exd3!
    • 1.Sfe7?
      • threat
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Bf3
        • 2.Qxh2#
      • 1...exd3!
    • 1.Sg7?
      • threat
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Bf3
        • 2.Qxh2#
      • 1...exd3!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qf6#
      • 1...Sxd5+
        • 2.Sb7#
      • 1...Se6+
        • 2.Sf7#
      • 1...Sa8+
        • 2.Se7#
      • 1...Se8+
        • 2.Se7#
      • 1...Kxd6
        • 2.Qf6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Bf3
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::QAB1(A)
    • Q(b);N_GUARD::QAB1(A),XQ(b)
    • R(j);N_GUARD::B(I),XS(k)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(A)
      • Vars
        • K(g);S_FLIGHT::QAR2(A)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
        • B(a);OGATE::QAB(A),XQ(b)
      • Refutation
        • P(d);XP(B)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XS(F)::QAB1(A)
      • Refutation
        • B(a);
    • Try
      • S(F);XP(i)
      • Threat
        • QAB1(A)
      • Vars
        • K(g);S_FLIGHT::QAR2(A)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
        • B(a);OGATE::QAB(A),XQ(b)
      • Refutation
        • P(d);XP(B)
    • Try
      • S(F);
      • Threat
        • QAB1(A)
      • Vars
        • K(g);S_FLIGHT::QAR2(A)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
        • B(a);OGATE::QAB(A),XQ(b)
      • Refutation
        • P(d);XP(B)
    • Try
      • S(F);
      • Threat
        • QAB1(A)
      • Vars
        • K(g);S_FLIGHT::QAR2(A)
        • Q(b);N_GUARD::QAB1(A),XQ(b)
        • B(a);OGATE::QAB(A),XQ(b)
      • Refutation
        • P(d);XP(B)
  • Actual
    • S(F);N_PINS(k)
    • Threat
      • QAB1(A)
    • Vars
      • S(k);CHECK,P_SPINS(k),XS(E)::B(I)+S(F)
      • S(k);CHECK,SBLOCK::B(I)+S(F),DCHECK
      • S(k);CHECK,N_GUARD::R(D)+S(E)
      • K(g);P_SPINS(k),S_FLIGHT,XS(F)::QAR2(A)
      • Q(b);N_GUARD::QAB1(A),XQ(b)
      • B(a);OGATE::QAB(A),XQ(b)
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