MESON Chess Problem Database

Problem Display
PID: 48418 (1N2k1K1/5R1Q/2N5/8/5n2/8/b7/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

Mat Plus, 1994

1N2k1K1/5R1Q/2N5/8/5n2/8/b7/8

#2

5 + 3

3713 Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Re7#
      • 2.Rf8#
    • 1...Bxf7+
      • 2.Qxf7#
    • 1...Sd5
      • 2.Rf8#
    • 1...Se6
      • 2.Re7#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sf6#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Sd5
        • 2.Rf8#
      • 1...Sh5!
    • 1.Qe4+?
      • 1...Se6
        • 2.Re7#
        • 2.Rf8#
      • 1...Be6!
    • 1.Qf5?
      • threat
        • 2.Qd7#
        • 2.Qc8#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Se6
        • 2.Re7#
      • 1...Be6!
    • 1.Qh4?
      • threat
        • 2.Qe7#
        • 2.Qd8#
      • 1...Sd5
        • 2.Rf8#
        • 2.Qd8#
      • 1...Se6
        • 2.Re7#
        • 2.Qe7#
      • 1...Sg6
        • 2.Qd8#
      • 1...Bxf7+!
    • 1.Qg7?
      • threat
        • 2.Qf8#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Se6
        • 2.Re7#
      • 1...Sg6!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Sc7#
      • 1...Bxf7+
        • 2.Qxf7#
      • 1...Sd5
        • 2.Rf8#
      • 1...Se6
        • 2.Re7#

Anticipated by 81576(1983)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,OGATE,XR(B)::QAB1(C),XB(a)
    • S(b);N_PINR(B)::R1(B)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • B(a);CHECK,OGATE,XR(B)::QAB1(C),XB(a)
        • S(b);N_PINR(B)::R1(B)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);CHECK,OGATE,XR(B)::QAB1(C),XB(a)
        • S(b);N_PINR(B)::R1(B)
      • Refutation
        • B(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(C)
      • Refutation
        • B(a);CHECK,XR(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • B(a);CHECK,OGATE,XR(B)::QAB1(C),XB(a)
        • S(b);N_PINR(B)::R1(B)
      • Refutation
        • S(b);
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • B(a);CHECK,OGATE,XR(B)::QAB1(C),XB(a)
      • S(b);N_PINR(B)::R1(B)
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