MESON Chess Problem Database

Problem Display
PID: 12373 (2R5/3p4/3p1RpK/5NB1/B2Pk3/5n2/2P5/1b5Q w - - 0 1)

Petkov, Petko Andonov

2nd Prize, Revista Romana de Sah, 1978

2R5/3p4/3p1RpK/5NB1/B2Pk3/5n2/2P5/1b5Q

#2

9 + 6

3750 FIDE Album (1977-1979) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qxf3#
    • 1...d5
      • 2.Re8#
  • Tries
    • 1.Bc6+?
      • 1...d5
        • 2.Re8#
      • 1...dxc6!
    • 1.Re6+?
      • 1...Kd5
        • 2.Bb3#
      • 1...Kxf5
        • 2.Qh3#
      • 1...dxe6!
    • 1.Rc3?
      • threat
        • 2.Qxf3#
      • 1...Kd5
        • 2.Qxf3#
      • 1...gxf5!
    • 1.Qe1+?
      • 1...Kd5
        • 2.Bb3#
        • 2.Rxd6#
        • 2.c4#
      • 1...Sxe1!
    • 1.Qh4+?
      • 1...Kd5
        • 2.Se3#
        • 2.Se7#
        • 2.Bb3#
        • 2.Rxd6#
        • 2.c4#
      • 1...Sxh4!
    • 1.c4?
      • threat
        • 2.Qxb1#
      • 1...Kd3
        • 2.Qxf3#
      • 1...Ba2
        • 2.Bc2#
      • 1...Bc2
        • 2.Bxc2#
      • 1...Bd3
        • 2.Re8#
      • 1...gxf5!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qxf3#
      • 1...Bxc2
        • 2.Bxc2#
      • 1...gxf5
        • 2.Re8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);S_FLIGHT::QAB(A),XS(b)
    • P(d);SBLOCK::R(I)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • P(d);P_SPINP(d)::R(I)
      • Refutation
        • P(f);XB(C)
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT::B(C)
        • K(c);N_SPINS(b),S_FLIGHT,XS(E)::QAB(A)
      • Refutation
        • P(f);XR(G)
    • Try
      • R(I);
      • Threat
        • QAB1(A),XS(b)
      • Vars
        • K(c);S_FLIGHT::QAB(A),XS(b)
      • Refutation
        • P(e);XS(E)
    • Try
      • Q(A);CHECK,N_PINS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK,N_PINS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • P(B);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT::QAR2(A),XS(b)
        • B(a);N_GUARD::B(C)
        • B(a);N_GUARD::B(C),XB(a)
        • B(a);SBLOCK::R(I)
      • Refutation
        • P(e);XS(E)
  • Actual
    • R(G);XP(d)
    • Threat
      • S(E)
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT,XS(E)::QAR2(A),XS(b)
      • B(a);OGATE,XP(B)::B(C),XB(a)
      • P(e);SBLOCK,XS(E)::R(I)
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