MESON Chess Problem Database

Problem Display
PID: 2495 (4B3/4p3/4kp2/3r1N1R/1K6/1Q6/8/B7 w - - 0 1)

Loyd, Sam

New York Turf, Field and Farm, 1868

4B3/4p3/4kp2/3r1N1R/1K6/1Q6/8/B7

#2

6 + 4

1679 American Chess Nuts 1868
5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qxd5#
      • 1...f5
        • 2.Rh6#
      • 1...Kd6!
    • 1.Sh4?
      • threat
        • 2.Qxd5#
      • 1...f5
        • 2.Rh6#
      • 1...Kd6!
    • 1.Be5?
      • threat
        • 2.Sd4#
        • 2.Sg7#
      • 1...Kxe5
        • 2.Qe3#
      • 1...fxe5!
  • Keys
    • 1.Kc4!
      • 1...Rd4+
        • 2.Kxd4#
      • 1...Rc5+
        • 2.Kxc5#
      • 1...Rxf5
        • 2.Qb6#
      • 1...Rd1
        • 2.Qe3#
      • 1...Rd2
        • 2.Qe3#
      • 1...Rd3
        • 2.Kxd3#
      • 1...Ra5
        • 2.Qb6#
      • 1...Rb5
        • 2.Kxb5#
      • 1...Re5
        • 2.Qb6#
      • 1...Rd6
        • 2.Sg7#
        • 2.Qe3#
      • 1...Rd7
        • 2.Qe3#
      • 1...Rd8
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(B),XR(a)
      • Vars
        • P(c);OGATEB::R(E)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB1(B),XR(a)
      • Vars
        • P(c);OGATEB::R(E)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINR(a),OGATEB,P-FLIGHT,XB(A)::QAR2(B)
      • Refutation
        • P(c);XB(A)
  • Actual
    • K(C);N_PINR(a),P-FLIGHT
    • Vars
      • R(a);CHECK::QAB(B)+K(C),XR(a)
      • R(a);N_GUARD,XS(D)::QAR(B)
      • R(a);N_GUARD::QAR(B)
      • R(a);::QAB(B)+K(C),XR(a)
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