MESON Chess Problem Database

Problem Display
PID: 11886 (1B1Q4/1bPP1n2/2k5/1R6/K7/6b1/8/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

1st Prize, Hlas l'udu, 1973

1B1Q4/1bPP1n2/2k5/1R6/K7/6b1/8/8

#2

6 + 4

2988 Izbrannie Kompozitsi 1985
273 Mat Plus 1994
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc7
      • 2.Qxc7#
  • Tries
    • 1.c8Q+?
      • 1...Bc7
        • 2.Qdxc7#
        • 2.Qcxc7#
      • 1...Bxc8!
    • 1.c8R+?
      • 1...Bc7
        • 2.Qxc7#
      • 1...Bxc8!
  • Keys
    • 1.Qe8!
      • threat
        • 2.d8Q#
        • 2.d8R#
      • 1...Kd6
        • 2.c8Q#
        • 2.c8R#
      • 1...Bxc7
        • 2.d8Q#
        • 2.d8R#
      • 1...Be1
        • 2.d8Q#
        • 2.d8R#
      • 1...Bf2
        • 2.d8Q#
        • 2.d8R#
      • 1...Bh2
        • 2.d8Q#
        • 2.d8R#
      • 1...Bf4
        • 2.d8Q#
        • 2.d8R#
      • 1...Bh4
        • 2.d8Q#
        • 2.d8R#
      • 1...Be5
        • 2.d8Q#
        • 2.d8R#
      • 1...Bd6
        • 2.d8Q#
        • 2.d8S#
        • 2.d8B#
        • 2.d8R#
      • 1...Ba6
        • 2.d8Q#
        • 2.d8R#
      • 1...Ba8
        • 2.d8Q#
        • 2.d8R#
      • 1...Bc8
        • 2.dxc8S#
      • 1...Se5
        • 2.Qe6#
      • 1...Sg5
        • 2.d8Q#
        • 2.d8R#
      • 1...Sh6
        • 2.d8Q#
        • 2.d8R#
      • 1...Sd8
        • 2.cxd8S#
      • 1...Sh8
        • 2.d8Q#
        • 2.d8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE,XP(C)::QAR1(F),XB(a)
  • Tries
    • Try
      • P(C);CHECK
      • Refutation
        • B(c);XQ(C)
    • Try
      • P(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(F),XB(a)
      • Refutation
        • B(c);XR(C)
  • Actual
    • Q(F);
    • Threat
      • P=Q
    • Vars
      • K(b);P-FLIGHT::P=Q
      • B(a);XP(C)::P=Q
      • B(a);::P=Q
      • B(c);::P=Q
      • B(c);OGATE::PXB(c)=S
      • S(d);N_GUARD,S_CUTB(a)::QAR2(F)
      • S(d);::P=Q
      • S(d);OGATE::PXS(d)=S
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