MESON Chess Problem Database

Problem Display
PID: 6579 (4B2Q/2K5/6PN/R3p2k/2N4p/8/6r1/1b6 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

Recomm., BCF 007. Ty., 1931-1932

4B2Q/2K5/6PN/R3p2k/2N4p/8/6r1/1b6

#2

7 + 5

3310 2345 Chess Problems 1997
136 Problem Observer 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Rxe5#
  • Tries
    • 1.Qxe5+?
      • 1...Kxh6
        • 2.Qh8#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Bf5!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Shf7#
      • 1...Rc2+
        • 2.Sc4#
      • 1...Kg5
        • 2.Sd3#
      • 1...Rxg6
        • 2.Sd3#
      • 1...Bxg6
        • 2.Seg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,P_PINS(A),S_CUTB(a)::R(B),XP(d)
  • Tries
    • Try
      • Q(G);CHECK,XP(d)
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR2(G)
        • R(b);N_GUARD,P_SPINR(b)::QAR1(G),XR(b)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(A);XP(d)
    • Threat
      • QAR(G)+S(D)
    • Vars
      • R(b);CHECK,N_GUARD,S_CUTB(a)::R(B)+S(A)
      • K(e);P-FLIGHT::R(B)+S(A)
      • R(b);N_GUARD,P_SPINR(b),XP(C)::R(B)+S(A)
      • B(a);N_GUARD,P_SPINB(a),XP(C)::R(B)+S(A)
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