MESON Chess Problem Database

Problem Display
PID: 110499 (7K/B7/4Q3/8/8/8/6pk/7B w - - 0 1)

White, Alain Campbell

Variation play, 1943

7K/B7/4Q3/8/8/8/6pk/7B

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh1
      • 2.Qh3#
      • 2.Qh6#
  • Tries
    • 1.Bb8+?
      • 1...Kg1
        • 2.Qe1#
      • 1...Kxh1!
    • 1.Qe5+?
      • 1...Kxh1
        • 2.Qh5#
      • 1...Kh3!
    • 1.Qd6+?
      • 1...Kxh1
        • 2.Qh6#
      • 1...Kh3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxg2#
        • 2.Qh4#
      • 1...Kxh1
        • 2.Qh3#
        • 2.Qh5#
        • 2.Qh4#
      • 1...gxh1Q
        • 2.Bb8#
      • 1...gxh1S
        • 2.Bg1#
      • 1...gxh1B
        • 2.Bg1#
        • 2.Bb8#
      • 1...gxh1R
        • 2.Bb8#
      • 1...g1Q
        • 2.Qh4#
      • 1...g1S
        • 2.Qg2#
      • 1...g1B
        • 2.Qg2#
        • 2.Qh4#
      • 1...g1R
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT,XB(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(A)::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(A)::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • P(a);SBLOCK,XB(A)::B(C)
      • P(a);::QAR2(B)
      • P(a);::QAR1(B)
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