MESON Chess Problem Database

Problem Display
PID: 224549 (3r4/2n1r1p1/4k3/1P1b1N2/5Q2/1N4B1/B7/6K1 w - - 0 1)

Quigley, J

English Mechanic and World of Science, 1887

(First published on Fri Oct 28 1887)

3r4/2n1r1p1/4k3/1P1b1N2/5Q2/1N4B1/B7/6K1

#2

7 + 6

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Sfd4#
  • Tries
    • 1.Sc5+?
      • 1...Kf6
        • 2.Sh4#
      • 1...Kf7!
    • 1.Sh6?
      • threat
        • 2.Sc5#
        • 2.Qf5#
      • 1...Bxb3
        • 2.Qf5#
      • 1...gxh6
        • 2.Sc5#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Ree8
        • 2.Qf7#
      • 1...Bc4
        • 2.Qf5#
      • 1...Be4
        • 2.Sc5#
      • 1...Red7
        • 2.Qe5#
      • 1...Rf8
        • 2.Sc5#
        • 2.Qd6#
      • 1...Sa6
        • 2.Qf5#
      • 1...g6
        • 2.Sc5#
      • 1...Kd7!
    • 1.Sxg7+?
      • 1...Kd7
        • 2.Qxc7#
      • 1...Rxg7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sc5#
        • 2.Qf5#
      • 1...Kd7
        • 2.Sc5#
      • 1...Rxd6
        • 2.Sc5#
      • 1...Bxb3
        • 2.Qf5#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Ree8
        • 2.Qf7#
      • 1...Bc4
        • 2.Qf5#
      • 1...Be4
        • 2.Sc5#
      • 1...Red7
        • 2.Qe5#
      • 1...Rf8
        • 2.Sc5#
      • 1...Sa6
        • 2.Qf5#
      • 1...g6
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK::S(G)
  • Tries
    • Try
      • S(C);CHECK,P_PINB(a)
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR(E)+S(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);P_SPINB(a),XS(C)::QAB1(E)
        • P(e);XS(G)::S(C)
        • R(d);N_GUARD::QAB1(E),XR(d)
        • R(d);N_GUARD::QAB1(E)
        • B(a);::QAB1(E)
        • B(a);::B(B)+S(C),DCHECK
        • R(d);SBLOCK::QAR1(E)
        • S(c);::QAB1(E)
        • P(e);::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(G);CHECK,XP(e)
      • Vars
        • K(b);S_FLIGHT::QAR1(E),XS(c)
      • Refutation
        • R(d);P_PINB(D),XS(G)
  • Actual
    • S(G);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT::S(C)
      • R(f);XS(G)::S(C)
      • B(a);P_SPINB(a),XS(C)::QAB1(E)
      • R(d);N_GUARD::QAB1(E),XR(d)
      • R(d);N_GUARD::QAB1(E)
      • B(a);::QAB1(E)
      • B(a);::B(B)+S(C),DCHECK
      • R(d);SBLOCK::QAR1(E)
      • R(f);::S(C)
      • S(c);::QAB1(E)
      • P(e);::S(C)
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