MESON Chess Problem Database

Problem Display
PID: 85557 (6RB/4b3/KQ3q2/1p1Pkr1p/2b4P/2n1N1P1/6B1/2N5 w - - 0 1)

Petrov, Evgeny Aleksandrovich

Canadian Chess Chat, 1981

6RB/4b3/KQ3q2/1p1Pkr1p/2b4P/2n1N1P1/6B1/2N5

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Rxg5#
    • 1...Ba2
      • 2.Sd3#
    • 1...Bb3
      • 2.Sd3#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bxd5
      • 2.Sd3#
    • 1...b4+
      • 2.Sxc4#
  • Tries
    • 1.Rg5?
      • threat
        • 2.Rxf5#
      • 1...b4+
        • 2.Sxc4#
      • 1...Bc5
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Rxg5!
    • 1.Re8?
      • threat
        • 2.Rxe7#
      • 1...b4+
        • 2.Sxc4#
      • 1...Bxd5
        • 2.Sd3#
      • 1...Sxd5!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Qe6#
      • 1...b4+
        • 2.Sxc4#
      • 1...Bxd5
        • 2.Sd3#
      • 1...Sxd5
        • 2.Re4#
      • 1...hxg4
        • 2.Sxg4#
      • 1...Rf4
        • 2.gxf4#
      • 1...Bd6
        • 2.Qd4#
      • 1...Se4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(e);OGATEB::R(I),XR(e)
    • B(b);N_GUARD::S(A)
    • B(b);N_GUARD::S(A),XB(b)
    • B(b);N_GUARD,XP(F)::S(A)
    • P(c);CHECK,N_GUARD::S(C),XB(b)
  • Tries
    • Try
      • R(I);P_PINR(e)
      • Threat
        • R1(I),XR(e)
      • Vars
        • P(c);CHECK,N_GUARD::S(C),XB(b)
        • B(b);N_GUARD::S(A),XB(b)
      • Refutation
        • R(e);N_SPINR(e),XR(I)
    • Try
      • R(I);P_PINB(h)
      • Threat
        • R(I),XB(h)
      • Vars
        • P(c);CHECK,N_GUARD::S(C),XB(b)
        • B(b);N_GUARD,XP(F)::S(A)
      • Refutation
        • S(a);XP(F)
  • Actual
    • R(I);
    • Threat
      • QAR1(H)
    • Vars
      • P(c);CHECK,N_GUARD::S(C),XB(b)
      • B(b);N_GUARD,XP(F)::S(A)
      • S(a);N_GUARD,XP(F)::R1(I)
      • P(f);XR(I)::S(C),XP(f)
      • R(e);OGATE::P(D),XR(e)
      • B(h);N_PINQ(H),SBLOCK::QAB1(H)
      • S(a);N_GUARD::R1(I),XS(a)
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