MESON Chess Problem Database

Problem Display
PID: 194301 (q1b2QB1/5R2/1R1n2N1/3k2p1/2p4r/b1p1P2p/8/6BK w - - 0 1)

Dobbs, Gilbert S

Pittsburgh Gazette-Times, 1917

q1b2QB1/5R2/1R1n2N1/3k2p1/2p4r/b1p1P2p/8/6BK

#2

8 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5+
      • 2.e4#
    • 1...Ke6+
      • 2.Rfb7#
    • 1...Re4
      • 2.Rf5#
    • 1...Se4
      • 2.Rf5#
      • 2.Rd7#
  • Tries
    • 1.Rf4+?
      • 1...Kc5+
        • 2.e4#
      • 1...Sf7
        • 2.e4#
      • 1...Be6!
    • 1.Rd7+?
      • 1...Kc5+
        • 2.e4#
      • 1...Ke4!
    • 1.Re7+?
      • 1...Kc5+
        • 2.e4#
      • 1...Sf7
        • 2.Re5#
      • 1...Be6!
    • 1.Qxd6+?
      • 1...Ke4
        • 2.Qd4#
      • 1...Bxd6!
    • 1.Qe7?
      • threat
        • 2.Rf5#
        • 2.Qe5#
      • 1...Kc5+
        • 2.e4#
      • 1...Sxf7
        • 2.Qe5#
      • 1...Re4
        • 2.Rf5#
      • 1...Bf5
        • 2.Rxf5#
        • 2.Qe5#
      • 1...Sf5
        • 2.Rxf5#
        • 2.Qe5#
      • 1...Be6!
    • 1.e4+?
      • 1...Ke6
        • 2.Ra7#
        • 2.Rfb7#
        • 2.Rc7#
        • 2.Re7#
        • 2.Rg7#
        • 2.Rh7#
        • 2.Qe7#
        • 2.Qe8#
      • 1...Rxe4
        • 2.Rf5#
      • 1...Sxe4
        • 2.Rf5#
        • 2.Rd7#
      • 1...Kxe4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Kc5+
        • 2.e4#
      • 1...Ke6+
        • 2.Rf3#
      • 1...Ke4
        • 2.Qd4#
      • 1...Re4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);CHECK,P-FLIGHT,P_SPINS(h)::B(A)+P(C)
    • K(f);CHECK,P_SPINS(h),S_FLIGHT::B(H)+R(F)
    • R(e);SBLOCK::B(H)+R(F),DCHECK
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(f);CHECK,P-FLIGHT,P_SPINS(h)::B(A)+P(C)
        • S(h);P_SPINS(h)::P(C)
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • R(F);CHECK,P_PINS(h)
      • Vars
        • K(f);CHECK,P-FLIGHT::B(A)+P(C)
      • Refutation
        • K(f);N_SPINS(h),S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(f);CHECK,P-FLIGHT::B(A)+P(C)
        • S(h);P_SPINS(h)::R1(F)
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • Q(G);CHECK,XS(h)
      • Vars
        • K(f);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • B(a);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(f);CHECK,P-FLIGHT,P_SPINS(h)::B(A)+P(C)
        • S(h);P_SPINS(h),XR(F)::QAR1(G)
        • R(e);::B(H)+R(F),DCHECK
      • Refutation
        • B(j);
    • Try
      • P(C);CHECK
      • Vars
        • R(e);SBLOCK,XP(C)::B(H)+R(F),DCHECK
      • Refutation
        • K(f);S_FLIGHT,XP(C)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(f);CHECK,P-FLIGHT::B(A)+P(C)
      • K(f);CHECK,P_SPINS(h),S_FLIGHT::B(H)+R(F)
      • K(f);S_FLIGHT::QAR1(G)
      • R(e);SBLOCK::B(H)+R(F),DCHECK
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