MESON Chess Problem Database

Problem Display
PID: 101385 (3R2q1/2p1Nrn1/4p2p/8/3Pk3/n4N2/rb1P1K1B/1b3B1Q w - - 0 1)

Sparke, Arthur M

Good Companions, 1919

3R2q1/2p1Nrn1/4p2p/8/3Pk3/n4N2/rb1P1K1B/1b3B1Q

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3+
      • 2.Qxf3#
    • 1...Rxe7
      • 2.Sh4#
    • 1...Bxd4+
      • 2.Rxd4#
    • 1...Sc2
      • 2.d3#
    • 1...Sf5
      • 2.Sg5#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Qe1#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Rxe7
        • 2.Sh4#
      • 1...Sxc4
        • 2.Qxb1#
      • 1...Sc2
        • 2.d3#
      • 1...Sf5
        • 2.Sg5#
      • 1...Bd3!
    • 1.Ba6?
      • threat
        • 2.Qe1#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Rxe7
        • 2.Sh4#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sb5
        • 2.Qxb1#
      • 1...Sc2
        • 2.d3#
      • 1...Sf5
        • 2.Sg5#
      • 1...Bd3!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Qe1#
      • 1...Rxf3+
        • 2.Qxf3#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Rxe7
        • 2.Sh4#
      • 1...Sxb5
        • 2.Qxb1#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Bd3
        • 2.Bc6#
      • 1...Sc2
        • 2.d3#
      • 1...Sf5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(i);CHECK,OGATE,P_SPINR(i),XS(F)::QAB1(B),XR(i)
    • R(i);N_PINS(F),XS(H)::QAB(B)+S(F)
    • B(c);CHECK,OGATE,P_PINP(C),XP(G)::R1(I),XB(c)
    • S(d);S_CUTB(a)::P(C)
    • S(j);N_PINS(F)::QAB(B)+S(F),DCHECK
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR(B)
      • Vars
        • R(i);CHECK,OGATE,P_SPINR(i),XS(F)::QAB1(B),XR(i)
        • B(c);CHECK,OGATE,P_PINP(C),XP(G)::R1(I),XB(c)
        • R(i);N_PINS(F),XS(H)::QAB(B)+S(F)
        • S(d);N_GUARD,XB(A)::QAB(B),XB(a)
        • S(d);S_CUTB(a)::P(C)
        • S(j);N_PINS(F)::QAB(B)+S(F),DCHECK
      • Refutation
        • B(a);
    • Try
      • B(A);
      • Threat
        • QAR(B)
      • Vars
        • R(i);CHECK,OGATE,P_SPINR(i),XS(F)::QAB1(B),XR(i)
        • B(c);CHECK,OGATE,P_PINP(C),XP(G)::R1(I),XB(c)
        • R(i);N_PINS(F),XS(H)::QAB(B)+S(F)
        • S(d);N_GUARD::QAB(B),XB(a)
        • S(d);S_CUTB(a)::P(C)
        • S(j);N_PINS(F)::QAB(B)+S(F),DCHECK
      • Refutation
        • B(a);
  • Actual
    • B(A);
    • Threat
      • QAR(B)
    • Vars
      • R(i);CHECK,OGATE,P_SPINR(i),XS(F)::QAB1(B),XR(i)
      • B(c);CHECK,OGATE,P_PINP(C),XP(G)::R1(I),XB(c)
      • R(i);N_PINS(F),XS(H)::QAB(B)+S(F)
      • S(d);N_GUARD,XB(A)::QAB(B),XB(a)
      • S(d);N_GUARD::QAB(B),XB(a)
      • B(a);SBLOCK::B(A)
      • S(d);S_CUTB(a)::P(C)
      • S(j);N_PINS(F)::QAB(B)+S(F),DCHECK
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