MESON Chess Problem Database

Problem Display
PID: 154040 (4r3/5p1n/p2p1P2/1p1Q1B1P/b1p1NN2/1n3kP1/3P1P1P/4K3 w - - 0 1)

Bishop, Norman R

Chess Amateur (The), 1911

4r3/5p1n/p2p1P2/1p1Q1B1P/b1p1NN2/1n3kP1/3P1P1P/4K3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4+
      • 2.Qxe4#
    • 1...Ra8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...Rb8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...Rc8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...Rd8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...Rf8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...Rg8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...Rh8
      • 2.Sc3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sxd6#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Se2?
      • threat
        • 2.Sg5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Kg2!
    • 1.Sg2?
      • threat
        • 2.Sh4#
      • 1...Rxe4+
        • 2.Qxe4#
      • 1...Kxg2!
    • 1.Qd4?
      • threat
        • 2.Qc3#
        • 2.Qe3#
      • 1...Rxe4+
        • 2.Qxe4#
      • 1...Sc1
        • 2.Qe3#
      • 1...Sc5
        • 2.Qe3#
      • 1...c3
        • 2.Qxc3#
        • 2.Qe3#
        • 2.Qd3#
      • 1...b4
        • 2.Qe3#
      • 1...Sxd4!
    • 1.h3?
      • threat
        • 2.Bg4#
      • 1...Rxe4+
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Rg8
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sg5#
        • 2.Sxd6#
      • 1...Sxf6!
  • Keys
    • 1.Kf1!
      • threat
        • 2.Sg5#
      • 1...Sxd2+
        • 2.Sxd2#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sg5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(j);CHECK,OGATE,P_SPINR(j),XS(F)::QAB1(H),XR(j)
    • P(d);N_GUARD::QAR2(H)
  • Tries
    • Try
      • S(G);N_SPINS(F)
      • Threat
        • QAB(H)+S(F),DCHECK
      • Vars
        • R(j);OGATE,P_PINS(G),P_SPINR(j),XS(F)::QAB1(H),XR(j)
        • S(i);::QAB(H)+S(F),DCHECK,XS(i)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • R(j);CHECK,OGATE,P_SPINR(j),XS(F)::QAB1(H),XR(j)
      • Refutation
        • K(b);S_FLIGHT,XS(G)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(j);CHECK,OGATE,XS(F)::QAB1(H),XR(j)
        • S(a);::QAR1(H)
        • P(e);::QAR1(H)
      • Refutation
        • S(a);XQ(H)
    • Try
      • P(D);
      • Threat
        • B(I)
      • Refutation
        • S(i);XP(K)
  • Actual
    • K(A);N_SPINS(F),P-FLIGHT
    • Threat
      • QAB(H)+S(F),DCHECK
    • Vars
      • S(a);CHECK,XP(B)::QAB(H)+S(F),DCHECK,XS(a)
      • R(j);OGATE,P_SPINR(j),XS(F)::QAB1(H),XR(j)
      • S(i);::QAB(H)+S(F),DCHECK,XS(i)
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