MESON Chess Problem Database

Problem Display
PID: 4545 (8/8/8/1K3pr1/5R2/5QRp/6qp/7k w - - 0 1)

Loyd, Sam

Dubuque Chess Journal, 1878

8/8/8/1K3pr1/5R2/5QRp/6qp/7k

#2

4 + 6

15 British Chess Magazine 1910

SOLUTION

  • SOUND
  • Sets
    • 1...Kg1
      • 2.Qd1#
      • 2.Qf1#
  • Tries
    • 1.Rxg5?
      • 1...Kg1
        • 2.Qd1#
        • 2.Qf1#
      • 1...Qxf3!
    • 1.Qd1+?
      • 1...Qf1+
        • 2.Rxf1#
        • 2.Qxf1#
      • 1...Qg1!
    • 1.Qe4?
      • threat
        • 2.Rf1#
      • 1...Kg1
        • 2.Qb1#
        • 2.Qe1#
      • 1...Qf3
        • 2.Qxf3#
      • 1...fxe4+!
    • 1.Qd5?
      • threat
        • 2.Rf1#
      • 1...Kg1
        • 2.Qd1#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qxd5+!
    • 1.Qc6?
      • threat
        • 2.Rf1#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Kg1
        • 2.Qc1#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qxc6+!
    • 1.Qf1+?
      • 1...Qxf1+
        • 2.Rxf1#
      • 1...Qg1!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Rf1#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qc6+
        • 2.Qxc6#
      • 1...Qb7+
        • 2.Qxb7#
      • 1...Kg1
        • 2.Qa1#
      • 1...Qf3
        • 2.Qxf3#

This is a version of 9317

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);XR(f)
      • Refutation
        • Q(b);N_SPINQ(b),XQ(A)
    • Try
      • Q(A);CHECK,N_PINQ(b)
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Vars
        • Q(b);OGATEB::QAB(A),XQ(b)
      • Refutation
        • P(e);CHECK,N_SPINQ(b),XQ(A)
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • Q(b);OGATEB::QAB(A),XQ(b)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XQ(A)
    • Try
      • Q(A);
      • Threat
        • R(C)
      • Vars
        • Q(b);CHECK,OGATEB::QAB(A),XQ(b)
        • K(a);P-FLIGHT::QAR(A)
        • Q(b);OGATEB::QAB(A),XQ(b)
      • Refutation
        • Q(b);CHECK,N_SPINQ(b),XQ(A)
    • Try
      • Q(A);CHECK,N_PINQ(b)
      • Vars
        • Q(b);CHECK,OGATE,XQ(A)::R(C),XQ(b)
      • Refutation
        • Q(b);P_SPINQ(b)
  • Actual
    • Q(A);
    • Threat
      • R(C)
    • Vars
      • Q(b);CHECK,OGATEB::QAB(A),XQ(b)
      • K(a);P-FLIGHT::QAR(A)
      • Q(b);OGATEB::QAB(A),XQ(b)
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