MESON Chess Problem Database

Problem Display
PID: 258597 (1NB5/3r4/Q7/2pP3P/2p1kP2/4rR2/2P1R1P1/7K w - - 0 1)

Clark, WA

English Mechanic and World of Science, 1897

(First published on Fri Dec 3 1897)

1NB5/3r4/Q7/2pP3P/2p1kP2/4rR2/2P1R1P1/7K

#2

11 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qg6#
    • 1...Rd6
      • 2.Qxc4#
    • 1...Ra7
      • 2.Qxc4#
    • 1...Rb7
      • 2.Qxc4#
    • 1...Rc7
      • 2.Qxc4#
    • 1...Re7
      • 2.Qxc4#
    • 1...Rf7
      • 2.Qxc4#
    • 1...Rg7
      • 2.Qxc4#
    • 1...Rh7
      • 2.Qxc4#
    • 1...Rd8
      • 2.Qxc4#
    • 1...c3
      • 2.Qd3#
  • Keys
    • 1.c3!
      • 1...Kd3
        • 2.Rfxe3#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qg6#
      • 1...Rxe2
        • 2.Qe6#
      • 1...Rxd5
        • 2.Rexe3#
      • 1...Rd6
        • 2.Qxc4#
      • 1...Ra7
        • 2.Qxc4#
      • 1...Rb7
        • 2.Qxc4#
      • 1...Rc7
        • 2.Qxc4#
      • 1...Re7
        • 2.Qxc4#
      • 1...Rf7
        • 2.Qxc4#
      • 1...Rg7
        • 2.Qxc4#
      • 1...Rh7
        • 2.Qxc4#
      • 1...Rd8
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,N_SPINR(a),P_SPINR(e),S_FLIGHT::QAB1(I)
    • R(e);::QAR2(I),XP(b)
    • R(e);P_PINP(H)::QAR2(I),XP(b)
    • P(b);OGATE::QAB1(I)
  • Actual
    • P(B);
    • Vars
      • K(c);N_GUARD,P_SPINP(b),S_FLIGHT::R1(E),XR(a)
      • K(c);N_SPINR(a),OGATEB,S_FLIGHT,XP(G)::QAB1(I)
      • K(c);N_GUARD,N_SPINR(a),P_SPINR(e),S_FLIGHT::QAB1(I)
      • R(a);N_SPINR(a),XR(C)::QAR2(I)
      • R(e);SBLOCK,XP(G)::R1(C),XR(a)
      • R(e);::QAR2(I),XP(b)
      • R(e);P_PINP(H)::QAR2(I),XP(b)
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