MESON Chess Problem Database

Problem Display
PID: 135383 (8/1p6/rBk5/p3p1Kp/P2R4/4Qpp1/8/2r5 w - - 0 1)

Challenger, Alfred Clement

The Field, 1915

(First published on Sat Sep 4 1915)

8/1p6/rBk5/p3p1Kp/P2R4/4Qpp1/8/2r5

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb6
      • 2.Rc4#
    • 1...Rxb6
      • 2.Qxc1#
    • 1...exd4
      • 2.Qe6#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Qh6#
      • 1...Kxb6
        • 2.Rc4#
      • 1...Rxb6
        • 2.Qxc1#
      • 1...exd4
        • 2.Qe6#
      • 1...Rh1+!
    • 1.Kxh5?
      • threat
        • 2.Qh6#
      • 1...Kxb6
        • 2.Rc4#
      • 1...Rxb6
        • 2.Qxc1#
      • 1...exd4
        • 2.Qe6#
      • 1...Rh1+!
    • 1.Qb3?
      • threat
        • 2.Qe6#
        • 2.Qb5#
      • 1...exd4
        • 2.Qe6#
      • 1...Rb1
        • 2.Qe6#
      • 1...Rc4
        • 2.Qb5#
      • 1...Rc5
        • 2.Qe6#
      • 1...Rxb6!
    • 1.Qxf3+?
      • 1...e4
        • 2.Qf6#
      • 1...Kxb6!
    • 1.Qxe5?
      • threat
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qc7#
        • 2.Qb5#
        • 2.Qe6#
      • 1...Rxb6
        • 2.Qd6#
      • 1...Rb1
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qc7#
        • 2.Qc5#
        • 2.Qe6#
      • 1...Rd1
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qc7#
        • 2.Qb5#
        • 2.Qc5#
        • 2.Qe6#
      • 1...Re1
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qc7#
        • 2.Qb5#
        • 2.Qc5#
      • 1...Rc5
        • 2.Rd6#
        • 2.Qxc5#
      • 1...Kxb6!
  • Keys
    • 1.Kf5!
      • threat
        • 2.Qh6#
      • 1...Kxb6
        • 2.Rc4#
      • 1...Rxb6
        • 2.Qxc1#
      • 1...exd4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(h);P-FLIGHT,XB(E)::QAB(A)+R(C)
    • R(g);SBLOCK,XB(E)::QAR(A),XR(a)
    • P(e);OGATE,XR(C)::QAR2(A)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • K(h);P-FLIGHT,XB(E)::QAB(A)+R(C)
        • R(g);SBLOCK,XB(E)::QAR(A),XR(a)
        • P(e);OGATE,XR(C)::QAR2(A)
      • Refutation
        • R(a);CHECK
    • Try
      • K(D);P-FLIGHT,XP(f)
      • Threat
        • QAR(A)
      • Vars
        • K(h);P-FLIGHT,XB(E)::QAB(A)+R(C)
        • R(g);SBLOCK,XB(E)::QAR(A),XR(a)
        • P(e);OGATE,XR(C)::QAR2(A)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);XR(C)::QAR2(A)
        • R(a);::QAR2(A)
        • R(a);::QAB1(A)
      • Refutation
        • R(g);XB(E)
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • P(e);P_SPINP(e)::QAR(A)
      • Refutation
        • K(h);P-FLIGHT,XB(E)
    • Try
      • Q(A);XP(e)
      • Threat
        • DUALS(6)
      • Vars
        • R(g);SBLOCK,XB(E)::QAR1(A)
      • Refutation
        • K(h);P-FLIGHT,XB(E)
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAR(A)
    • Vars
      • K(h);P-FLIGHT,XB(E)::QAB(A)+R(C)
      • R(g);SBLOCK,XB(E)::QAR(A),XR(a)
      • P(e);OGATE,XR(C)::QAR2(A)
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