MESON Chess Problem Database

Problem Display
PID: 243056 (2b5/2q1p1Q1/1b6/3pN1pK/2p1pPPp/2B1k2N/4B1R1/5R2 w - - 0 1)

Makarenko, Petr Leontevich

Pankratiev, Aleksandr Nikolaevich

Schweizerische Schachzeitung, 1991

2b5/2q1p1Q1/1b6/3pN1pK/2p1pPPp/2B1k2N/4B1R1/5R2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg4+
      • 2.Sxg4#
  • Tries
    • 1.Bxc4?
      • threat
        • 2.Re1#
        • 2.Re2#
      • 1...Bxg4+
        • 2.Sxg4#
      • 1...Qxe5
        • 2.Re2#
      • 1...dxc4
        • 2.Re1#
      • 1...Qxc4!
    • 1.Re1?
      • threat
        • 2.Bd1#
        • 2.Bf1#
        • 2.Bd3#
        • 2.Bf3#
        • 2.Bxc4#
      • 1...Bxg4+
        • 2.Sxg4#
        • 2.Bxg4#
      • 1...Qxe5!
    • 1.Rg3+?
      • 1...Kxe2
        • 2.Re1#
      • 1...hxg3!
    • 1.Qxg5?
      • threat
        • 2.f5#
      • 1...Bxg4+
        • 2.Sxg4#
      • 1...Qxe5
        • 2.fxe5#
      • 1...Bf5!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sd1#
      • 1...Bxg4+
        • 2.Sfxg4#
      • 1...Kxe2
        • 2.Re1#
      • 1...Kxf4
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(j);CHECK,XP(G)::S(H),XB(j)
  • Tries
    • Try
      • B(B);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(j);CHECK,XP(G)::S(H),XB(j)
        • Q(h);XS(H)::R1(C)
        • P(e);XB(B)::R(A)
      • Refutation
        • Q(h);XB(B)
    • Try
      • R(A);
      • Threat
        • DUALS(5)
      • Refutation
        • Q(h);XS(H)
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(B)::R1(A)
      • Refutation
        • P(d);XR(C)
    • Try
      • Q(J);XP(f)
      • Threat
        • QAB(J)+P(F)
      • Vars
        • B(j);CHECK,XP(G)::S(H),XB(j)
        • Q(h);OGATE,P_PINQ(J),XS(H)::QAB(J)+P(F),XQ(h)
      • Refutation
        • B(j);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • B(j);CHECK,XP(G)::S(E),XB(j)
      • K(a);OGATEB,P-FLIGHT,XB(B)::R1(A)
      • K(a);OGATEB,S_FLIGHT,XP(F)::QAB1(J),XP(f)
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