MESON Chess Problem Database

Problem Display
PID: 275371 (8/1B6/2n5/r2P3R/p2k2N1/3n1pN1/2QK4/b7 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

British Chess Magazine, 1935

8/1B6/2n5/r2P3R/p2k2N1/3n1pN1/2QK4/b7

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxd3#
    • 1...Bc3+
      • 2.Qxc3#
    • 1...Sb2
      • 2.Qc3#
  • Tries
    • 1.Se2+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Qxd3#
      • 1...fxe2!
    • 1.Sf5+?
      • 1...Kxd5
        • 2.Qxc6#
      • 1...Ke4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qc4#
      • 1...Bc3+
        • 2.Qxc3#
      • 1...Rc5
        • 2.Qxd3#
      • 1...Sb2
        • 2.Qc3#
      • 1...Sde5
        • 2.Sgf5#
      • 1...Sce5
        • 2.Sef5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK::QAR1(A),XS(b)
    • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
    • S(b);S_CUTB(a)::QAB1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(c);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_GUARD,P-FLIGHT,P_SPINS(g),XP(E)::QAB1(A),XS(g)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(b)
  • Actual
    • S(D);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
      • R(f);SBLOCK::QAR1(A),XS(b)
      • S(b);S_CUTB(a)::QAB1(A)
      • S(b);SBLOCK::S(C)
      • S(g);SBLOCK::S(D)
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