MESON Chess Problem Database

Problem Display
PID: 138980 (6bq/8/4p2b/5P2/R2PkN2/1Qp1N3/K5P1/4R3 w - - 0 1)

Dobbs, Gilbert S

The Problemist, 1936

6bq/8/4p2b/5P2/R2PkN2/1Qp1N3/K5P1/4R3

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Qc2#
    • 1...exf5
      • 2.Sed5#
    • 1...e5
      • 2.d5#
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qf3#
      • 1...exf5+
        • 2.Sed5#
      • 1...e5+
        • 2.d5#
      • 1...Kxf4
        • 2.Qg4#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Bxf4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(d);SBLOCK,XS(H)::QAB(D)
    • P(c);P_PINQ(D),SBLOCK,XP(I)::R(A)+S(E)
    • P(c);P_PINQ(D),SBLOCK,S_CUTQ(f)::R(F)+P(G)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • P(c);CHECK,SBLOCK,XP(I)::R(A)+S(E)
      • P(c);CHECK,SBLOCK,S_CUTQ(f)::R(F)+P(G)
      • K(b);OGATEB,P-FLIGHT,XS(H)::QAR1(D)
      • Q(f);OGATE,P_SPINQ(f),XP(G)::QAR1(D),XQ(f)
      • B(d);SBLOCK,XS(H)::QAB(D)
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