MESON Chess Problem Database

Problem Display
PID: 68978 (1nrrR3/2Bk4/p2p2K1/N7/8/8/8/3Q4 w - - 0 1)

Lord, Frederick William

The Chess Player's Chronicle (Sampson), 1873

1nrrR3/2Bk4/p2p2K1/N7/8/8/8/3Q4

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe8
      • 2.Qxd6#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Re7#
        • 2.Qxd6#
      • 1...Rxc7
        • 2.Qg4#
      • 1...Rxe8
        • 2.Qxd6#
      • 1...Sc6
        • 2.Qxd6#
      • 1...d5
        • 2.Re7#
      • 1...Kxc7!
    • 1.Rxd8+?
      • 1...Ke6
        • 2.Qxd6#
      • 1...Kxc7
        • 2.Qxd6#
      • 1...Ke7
        • 2.Qe2#
        • 2.Qe1#
        • 2.Qxd6#
      • 1...Rxd8!
    • 1.Qa4+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kxc7!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qf7#
      • 1...Kxc7
        • 2.Qb7#
      • 1...Kxe8
        • 2.Qf7#
      • 1...Rxc7
        • 2.Qe6#
      • 1...Rxe8
        • 2.Qxd6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XR(E)::QAR1(A),XP(b)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(e);SBLOCK,XB(D)::QAB(A)
        • R(f);XR(E)::QAR1(A),XP(b)
        • S(d);::QAR1(A),XP(b)
        • P(b);::R1(E)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XB(D)
    • Try
      • R(E);CHECK,XR(f)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAR1(A),XP(b)
        • K(c);N_SPINP(b),P-FLIGHT,XB(D)::QAB1(A),XP(b)
      • Refutation
        • R(e);XR(E)
    • Try
      • Q(A);CHECK,N_PINP(b)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(A),XS(d)
      • Refutation
        • K(c);P-FLIGHT,XB(D)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(c);N_SPINP(b),OGATEB,P-FLIGHT,XB(D)::QAR1(A)
      • K(c);N_SPINP(b),S_FLIGHT,XR(E)::QAB1(A)
      • R(e);SBLOCK,XB(D)::QAB1(A)
      • R(f);SBLOCK,XR(E)::QAR1(A),XP(b)
      • S(d);N_GUARD::QAB1(A),XS(d)
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