MESON Chess Problem Database

Problem Display
PID: 136608 (8/5pQ1/3p4/1p1PnK2/1p1kN3/1Bp1q3/2P5/6B1 w - - 0 1)

Baird, Edith Elina Helen (Mrs WJ)

The Field, 1920

(First published on Sat Apr 24 1920)

8/5pQ1/3p4/1p1PnK2/1p1kN3/1Bp1q3/2P5/6B1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg1
      • 2.Qxg1#
    • 1...Qf2+
      • 2.Bxf2#
    • 1...f6
      • 2.Qa7#
  • Tries
    • 1.Sd2?
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Kc5
        • 2.Bxe3#
      • 1...Qxg1
        • 2.Qxg1#
      • 1...f6
        • 2.Qa7#
      • 1...cxd2!
    • 1.Sg3?
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Kc5
        • 2.Bxe3#
      • 1...f6
        • 2.Qa7#
      • 1...Qxg1!
    • 1.Sg5?
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Kc5
        • 2.Bxe3#
      • 1...f6
        • 2.Se6#
        • 2.Qa7#
      • 1...Qxg1!
    • 1.Sxd6?
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Qxg1
        • 2.Qxg1#
      • 1...f6
        • 2.Qa7#
      • 1...Kc5!
    • 1.Bf2?
      • 1...f6
        • 2.Qa7#
      • 1...Qxf2+!
    • 1.Ba2?
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Qxg1
        • 2.Qxg1#
      • 1...f6
        • 2.Qa7#
      • 1...b3!
    • 1.Qf6?
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Qxg1!
  • Keys
    • 1.Sc5!
      • 1...Qf2+
        • 2.Bxf2#
      • 1...Kxc5
        • 2.Bxe3#
      • 1...Qxg1
        • 2.Qxg1#
      • 1...dxc5
        • 2.Qxe5#
      • 1...f6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(G),XQ(b)
    • Q(b);CHECK,OGATEB::B(A),XQ(b)
    • P(h);N_SPINS(f),OGATE::QAB(G)
  • Tries
    • Try
      • S(D);
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • K(d);N_SPINS(f),S_FLIGHT::B(A),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(G),XQ(b)
        • P(h);N_SPINS(f),OGATE::QAB(G)
      • Refutation
        • P(a);XS(D)
    • Try
      • S(D);
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • K(d);N_SPINS(f),S_FLIGHT::B(A),XQ(b)
        • P(h);N_SPINS(f),OGATE::QAB(G)
      • Refutation
        • Q(b);N_SPINQ(b),XB(A)
    • Try
      • S(D);
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • K(d);N_SPINS(f),S_FLIGHT::B(A),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XB(A)
    • Try
      • S(D);XP(g)
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(G),XQ(b)
        • P(h);N_SPINS(f),OGATE::QAB(G)
      • Refutation
        • K(d);N_SPINS(f),S_FLIGHT
    • Try
      • B(A);
      • Vars
        • P(h);N_SPINS(f),OGATE::QAB(G)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XB(A)
    • Try
      • B(C);
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(G),XQ(b)
        • P(h);N_SPINS(f),OGATE::QAB(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • Q(b);CHECK,OGATEB::B(A),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XB(A)
  • Actual
    • S(D);
    • Vars
      • Q(b);CHECK,OGATEB::B(A),XQ(b)
      • K(d);N_SPINS(f),S_FLIGHT,XS(D)::B(A),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XB(A)::QAB(G),XQ(b)
      • P(g);N_GUARD,SBLOCK,XS(D)::QAB1(G),XS(f)
      • P(h);N_GUARD,N_SPINS(f)::S(D)
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