MESON Chess Problem Database

Problem Display
PID: 89111 (8/8/8/8/8/4p1p1/1Q6/R3K1Bk w Q - 0 1)

Rice, John Michael

The Problemist, 1991

8/8/8/8/8/4p1p1/1Q6/R3K1Bk

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxg1
      • 2.0-0-0#
  • Tries
    • 1.Kf1?
      • threat
        • 2.Qh8#
        • 2.Qg2#
      • 1...g2+
        • 2.Qxg2#
      • 1...e2+!
    • 1.Ke2?
      • 1...g2
        • 2.Qh8#
      • 1...Kg2!
    • 1.Ra2?
      • threat
        • 2.Qg2#
      • 1...Kxg1
        • 2.Qg2#
      • 1...g2
        • 2.Qxg2#
      • 1...e2!
    • 1.Qe2?
      • 1...Kxg1
        • 2.0-0-0#
      • 1...g2!
    • 1.0-0-0?
      • threat
        • 2.Bh2#
        • 2.Bxe3#
      • 1...g2
        • 2.Qh8#
      • 1...e2!
  • Keys
    • 1.Bxe3!
      • 1...g2
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT,XB(C)::0-0-0
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(c);CHECK::QAB1(D),XP(c)
      • Refutation
        • P(b);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAB(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT,XB(C)::QAR1(D)
        • P(c);::QAB1(D),XP(c)
      • Refutation
        • P(b);
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,XB(C)::0-0-0
      • Refutation
        • P(c);
    • Try
      • K(B);0-0-0
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAB(D)
      • Refutation
        • P(b);
  • Actual
    • B(C);XP(b)
    • Vars
      • P(c);SBLOCK::QAB(D)
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