MESON Chess Problem Database

Problem Display
PID: 149975 (3R1B2/2p5/1PPn1R2/2Pk2N1/1K2p1P1/8/3P4/7B w - - 0 1)

Calapso, Remo

L'Alfiere di Re, 1921

3R1B2/2p5/1PPn1R2/2Pk2N1/1K2p1P1/8/3P4/7B

#2

11 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Bxe4#
  • Tries
    • 1.Sf7?
      • 1...Kxc6
        • 2.Bxe4#
      • 1...cxb6
        • 2.Rfxd6#
        • 2.Rdxd6#
      • 1...Kd4!
    • 1.Bxd6?
      • threat
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Bxc7#
      • 1...Kd4
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Bxc7#
      • 1...Kxc6
        • 2.Bxe4#
      • 1...cxb6
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Bc7#
        • 2.Bb8#
      • 1...cxd6!
    • 1.Re6?
      • 1...Kxc6
        • 2.Bxe4#
      • 1...cxb6
        • 2.Rdxd6#
      • 1...Kd4!
    • 1.Rdxd6+?
      • 1...Ke5
        • 2.Sf7#
        • 2.Rf5#
      • 1...cxd6!
    • 1.d4?
      • 1...Kxc6
        • 2.Bxe4#
      • 1...cxb6
        • 2.Rfxd6#
        • 2.Rdxd6#
      • 1...Kxd4!
  • Keys
    • 1.Bg7!
      • 1...Kd4
        • 2.Rfxd6#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kxc6
        • 2.Bxe4#
      • 1...cxb6
        • 2.Rfxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XP(H)::B(A),XP(a)
  • Tries
    • Try
      • S(F);
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • B(K);XS(c)
      • Threat
        • DUALS(4)
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(A),XP(a)
      • Refutation
        • P(d);XB(K)
    • Try
      • R(I);
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(A),XP(a)
        • P(d);N_GUARD,XP(G)::R1(J),XS(c)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • R(J);CHECK,XS(c)
      • Refutation
        • P(d);XR(J)
    • Try
      • P(B);
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XP(B)
  • Actual
    • B(K);
    • Vars
      • K(b);N_SPINP(a),P-FLIGHT::B(K)+R(I),DCHECK,XS(c)
      • K(b);N_SPINP(a),N_SPINS(c),P-FLIGHT::B(K)+R(I),DCHECK
      • K(b);S_FLIGHT,XP(H)::B(A),XP(a)
      • P(d);N_GUARD,XP(G)::R1(I),XS(c)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).