MESON Chess Problem Database

Problem Display
PID: 257871 (3K4/4P1Q1/5p2/R2N1k2/b2r1p2/2N3b1/B3R3/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

British Chess Magazine, 1934

3K4/4P1Q1/5p2/R2N1k2/b2r1p2/2N3b1/B3R3/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Se3#
    • 1...Re4
      • 2.Se3#
    • 1...Rxd5+
      • 2.Rxd5#
    • 1...Bd7
      • 2.Se3#
  • Tries
    • 1.Re5+?
      • 1...Kxe5
        • 2.Qxf6#
      • 1...fxe5!
    • 1.e8Q?
      • threat
        • 2.Qh5#
        • 2.Qeg6#
        • 2.Qgg6#
        • 2.Qe6#
      • 1...Rxd5+
        • 2.Rxd5#
      • 1...Re4
        • 2.Se3#
        • 2.Se7#
        • 2.Qgg6#
        • 2.Qxe4#
      • 1...Bh4
        • 2.Qeg6#
        • 2.Qgg6#
        • 2.Qe6#
      • 1...Bd7
        • 2.Se3#
        • 2.Se7#
        • 2.Qh5#
        • 2.Qeg6#
        • 2.Qexd7#
        • 2.Qgg6#
      • 1...Bxe8!
    • 1.e8B?
      • threat
        • 2.Qg6#
      • 1...Rxd5+
        • 2.Rxd5#
      • 1...Re4
        • 2.Se3#
        • 2.Se7#
      • 1...Bxe8!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sd6#
      • 1...Ke5
        • 2.Qxf6#
      • 1...Ke6
        • 2.Qxf6#
      • 1...Rxe4
        • 2.Se3#
      • 1...f3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_PINS(E)::R(D)+S(E),DCHECK
    • R(c);CHECK,OGATE,P_SPINR(c),XS(E)::R(D),XR(c)
    • B(b);N_PINS(E)::R(D)+S(E),DCHECK
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(e);N_GUARD,P-FLIGHT,P_SPINP(f),XR(B)::QAB1(G),XP(f)
      • Refutation
        • P(f);XR(B)
    • Try
      • P(F);
      • Threat
        • DUALS(4)
      • Vars
        • R(c);CHECK,OGATE,P_SPINR(c),XS(E)::R(D),XR(c)
      • Refutation
        • B(b);XQ(F)
    • Try
      • P(F);
      • Threat
        • QAB1(G)
      • Vars
        • R(c);CHECK,OGATE,P_SPINR(c),XS(E)::R(D),XR(c)
      • Refutation
        • B(b);XB(F)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(e);N_GUARD,P-FLIGHT,P_SPINP(f)::QAB1(G),XP(f)
      • K(e);N_GUARD,S_FLIGHT::QAR1(G),XP(f)
      • R(c);N_PINS(E),SBLOCK,XS(C)::R(D)+S(E),DCHECK
      • P(d);N_GUARD::S(C),XB(a)
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