MESON Chess Problem Database

Problem Display
PID: 53507 (8/7Q/1n6/3pp3/4N3/3k2p1/K1N3R1/7B w - - 0 1)

Dobbs, Gilbert S

The Chess Review, 1934

8/7Q/1n6/3pp3/4N3/3k2p1/K1N3R1/7B

#2

6 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Kb3?
      • threat
        • 2.Sc5#
        • 2.Rd2#
      • 1...Sc4
        • 2.Sc5#
      • 1...dxe4!
    • 1.Sc5+?
      • 1...Kc3
        • 2.Qd3#
      • 1...Kc4!
  • Keys
    • 1.Qf7!
      • 1...Kc4
        • 2.Qf1#
      • 1...Kxe4
        • 2.Rxg3#
      • 1...dxe4
        • 2.Qb3#
      • 1...Sa4
        • 2.Qxd5#
      • 1...Sc4
        • 2.Qxd5#
      • 1...Sd7
        • 2.Qxd5#
      • 1...Sa8
        • 2.Qxd5#
      • 1...Sc8
        • 2.Qxd5#
      • 1...d4
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAB(F)+S(E),DCHECK
      • Refutation
        • P(c);P_SPINP(c),XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);P_SPINP(c),S_FLIGHT::QAB(F)
      • K(a);S_FLIGHT,XS(E)::B(A)+R(D),XP(b)
      • P(c);OGATE,SBLOCK,XS(E)::QAR2(F)
      • S(e);N_GUARD::QAR2(F),XP(c)
      • P(c);::R1(D)
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