MESON Chess Problem Database

Problem Display
PID: 163088 (8/5p1K/2p2p1B/2pPp3/R2pk3/8/B3N2N/4R3 w - - 0 1)

Cuttle, HM

The Observer, 1925

(First published on Sun Feb 15 1925)

8/5p1K/2p2p1B/2pPp3/R2pk3/8/B3N2N/4R3

#2

8 + 7

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Bb1#
    • 1...Kf5
      • 2.Sg3#
    • 1...cxd5
      • 2.Bb1#
    • 1...f5
      • 2.Sc1#
      • 2.Sf4#
  • Tries
    • 1.Kg7?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf5
        • 2.Sg3#
      • 1...cxd5
        • 2.Bb1#
      • 1...f5
        • 2.Sc1#
        • 2.Sf4#
      • 1...c4!
    • 1.Sc3+?
      • 1...Kf5
        • 2.Rf1#
      • 1...Kd3!
    • 1.Bc4?
      • threat
        • 2.Sg3#
      • 1...Kf5
        • 2.Sg3#
      • 1...d3!
    • 1.Bc1?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf5
        • 2.Sg3#
      • 1...cxd5
        • 2.Bb1#
      • 1...f5
        • 2.Sf4#
      • 1...c4!
    • 1.Rd1?
      • threat
        • 2.Sg3#
      • 1...Kf5
        • 2.Sg3#
      • 1...c4!
    • 1.dxc6?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf5
        • 2.Sg3#
      • 1...f5
        • 2.Sc1#
        • 2.Sf4#
      • 1...c4!
    • 1.d6?
      • 1...Kd3
        • 2.Bb1#
      • 1...Kf5
        • 2.Sg3#
      • 1...f5
        • 2.Sc1#
        • 2.Sf4#
      • 1...c4!
  • Keys
    • 1.Rc4!
      • 1...Kd3
        • 2.Sc1#
      • 1...Kxd5
        • 2.Rxd4#
      • 1...Kf5
        • 2.Sg3#
      • 1...cxd5
        • 2.Bb1#
      • 1...f5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::B(B)
    • K(b);N_SPINP(a),S_FLIGHT::S(C)
    • P(e);SBLOCK,XP(F)::B(B)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(B)
        • K(b);N_SPINP(a),S_FLIGHT::S(C)
        • P(e);SBLOCK,XP(F)::B(B)
      • Refutation
        • P(c);N_SPINP(a)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • B(B);N_PINP(a)
      • Threat
        • R(A)+S(C),DCHECK
      • Vars
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • P(a);
    • Try
      • B(G);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(B)
        • K(b);N_SPINP(a),S_FLIGHT::S(C)
        • P(e);SBLOCK,XP(F)::B(B)
        • P(f);SBLOCK::R(A)+S(C)
      • Refutation
        • P(c);N_SPINP(a)
    • Try
      • R(A);
      • Threat
        • S(C)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::S(C)
      • Refutation
        • P(c);N_SPINP(a)
    • Try
      • P(F);XP(e)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(B)
        • K(b);N_SPINP(a),S_FLIGHT::S(C)
      • Refutation
        • P(c);N_SPINP(a)
    • Try
      • P(F);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::B(B)
        • K(b);N_SPINP(a),S_FLIGHT::S(C)
      • Refutation
        • P(c);N_SPINP(a)
  • Actual
    • R(E);
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::S(C)
      • K(b);N_SPINP(a),S_FLIGHT,XP(F)::B(B)+R(E),DCHECK,XP(a)
      • P(e);SBLOCK,XP(F)::B(B)
      • P(f);SBLOCK::R(A)+S(C)
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