MESON Chess Problem Database

Problem Display
PID: 3202 (3n4/3Q4/K2p4/1p1k4/1R1P1RP1/2pNp3/8/7b w - - 0 1)

Gorbatenko, Yuri Grigorevich

Kopnin, Aleksey Grigorevich

1st Prize, Source?, 1979

3n4/3Q4/K2p4/1p1k4/1R1P1RP1/2pNp3/8/7b

#2

7 + 7

3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qf7#
    • 1...Se6
      • 2.Qb7#
  • Tries
    • 1.Kxb5?
      • threat
        • 2.Qf5#
      • 1...Sc6
        • 2.Qf7#
      • 1...Se6
        • 2.Qc6#
        • 2.Qb7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Be4!
    • 1.Kb6?
      • threat
        • 2.Qf5#
      • 1...Sc6
        • 2.Qf7#
      • 1...Se6
        • 2.Qc6#
        • 2.Qb7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Be4!
    • 1.Sc5?
      • threat
        • 2.Rf5#
      • 1...Sc6
        • 2.Qe6#
        • 2.Qf7#
      • 1...Sf7
        • 2.Qb7#
      • 1...Be4!
    • 1.Se5?
      • threat
        • 2.Rxb5#
      • 1...Se6
        • 2.Qc6#
        • 2.Qb7#
      • 1...Sb7
        • 2.Qf7#
      • 1...Be4!
    • 1.Rc4?
      • threat
        • 2.Rc5#
      • 1...Kxc4
        • 2.Qxb5#
      • 1...bxc4
        • 2.Sb4#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qf7#
      • 1...Be4!
    • 1.Qe8?
      • threat
        • 2.Rf5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sc6
        • 2.Qf7#
        • 2.Qg8#
      • 1...Se6
        • 2.Qa8#
      • 1...Sf7!
  • Keys
    • 1.Re4!
      • threat
        • 2.Re5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Bxe4
        • 2.Sf4#
      • 1...Sc6
        • 2.Qe6#
      • 1...Sf7
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD,SBLOCK::QAB(G)
  • Tries
    • Try
      • K(F);S_FLIGHT,XP(d)
      • Threat
        • QAR2(G)
      • Vars
        • S(g);N_GUARD::QAB(G)
        • S(g);N_GUARD::QAB(G),XS(g)
      • Refutation
        • B(a);
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAR2(G)
      • Vars
        • S(g);N_GUARD::QAB(G)
        • S(g);N_GUARD::QAB(G),XS(g)
      • Refutation
        • B(a);
    • Try
      • S(A);
      • Threat
        • R(D)
      • Vars
        • S(g);N_GUARD::QAB(G)
      • Refutation
        • B(a);
    • Try
      • S(A);
      • Threat
        • R(B),XP(d)
      • Vars
        • S(g);N_GUARD::QAB(G)
      • Refutation
        • B(a);
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • K(e);N_SPINP(f),S_FLIGHT,XR(B)::QAB1(G),XP(d)
        • P(d);SBLOCK,XR(B)::S(A)
        • S(g);N_GUARD,SBLOCK::QAB1(G)
        • S(g);N_GUARD::QAB(G)
      • Refutation
        • B(a);
    • Try
      • Q(G);N_PINP(f)
      • Threat
        • R(D)
      • Vars
        • B(a);N_GUARD::QAB1(G),XB(a)
        • S(g);OGATE,SBLOCK::QAB(G)
      • Refutation
        • S(g);
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • K(e);N_SPINP(f),S_FLIGHT,XR(D)::QAB1(G)
      • B(a);SBLOCK,XR(D)::S(A)
      • S(g);N_GUARD,SBLOCK::QAB1(G)
      • S(g);N_GUARD::QAB(G)
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