MESON Chess Problem Database

Problem Display
PID: 202489 (b1R2N1k/5P2/6K1/b5p1/5P2/2r1p3/1r5B/Q6R w - - 0 1)

Niemela, Aki R

ten Cate, Pieter

Western Morning News and Mercury, 1923

b1R2N1k/5P2/6K1/b5p1/5P2/2r1p3/1r5B/Q6R

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.Rxh2#
    • 1...Rb6+
      • 2.Se6#
    • 1...Rb7
      • 2.Bg1#
      • 2.Bg3#
  • Tries
    • 1.Se6+?
      • 1...Bd8
        • 2.Rxd8#
        • 2.f8Q#
        • 2.f8R#
      • 1...Rxc8!
    • 1.Sd7+?
      • 1...Bd8
        • 2.Rxd8#
        • 2.f8Q#
        • 2.f8R#
      • 1...Rxc8!
    • 1.Sh7+?
      • 1...Bd8
        • 2.Rxd8#
        • 2.f8Q#
        • 2.f8R#
      • 1...Rxc8!
    • 1.Bg1+?
      • 1...Rh2
        • 2.Rxh2#
      • 1...Bxh1!
    • 1.Bg3+?
      • 1...Rh2
        • 2.Rxh2#
      • 1...Bxh1!
    • 1.fxg5?
      • threat
        • 2.Be5#
      • 1...Rb6+
        • 2.Se6#
      • 1...Rc6+
        • 2.Bd6#
      • 1...Rxh2
        • 2.Rxh2#
      • 1...Be4+!
  • Keys
    • 1.f5!
      • threat
        • 2.Be5#
      • 1...Rb6+
        • 2.Se6#
      • 1...Rc6+
        • 2.Bd6#
      • 1...Rxh2
        • 2.Rxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,P_SPINR(a),XB(C)::R(B),XR(a)
    • R(a);CHECK,P_SPINR(b),S_CUTB(d)::R(G)+S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • R(b);P_SPINR(a),XR(G)
    • Try
      • S(H);CHECK
      • Refutation
        • R(b);P_SPINR(a),XR(G)
    • Try
      • S(H);CHECK
      • Refutation
        • R(b);P_SPINR(a),XR(G)
    • Try
      • B(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R(B),XR(a)
      • Refutation
        • B(f);XR(B)
    • Try
      • B(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::R(B),XR(a)
      • Refutation
        • B(f);XR(B)
    • Try
      • P(D);XP(e)
      • Threat
        • R(B)+B(C),DCHECK
      • Vars
        • R(a);CHECK,P_SPINR(b),S_CUTB(d)::R(G)+S(H)
        • R(b);CHECK,P_SPINR(a),S_CUTB(f)::R(B)+B(C)
        • R(a);OGATE,P_SPINR(a),XB(C)::R(B),XR(a)
      • Refutation
        • B(f);CHECK
  • Actual
    • P(D);
    • Threat
      • R(B)+B(C),DCHECK
    • Vars
      • R(a);CHECK,P_SPINR(b),S_CUTB(d)::R(G)+S(H)
      • R(b);CHECK,P_SPINR(a),S_CUTB(f)::R(B)+B(C)
      • R(a);OGATE,P_SPINR(a),XB(C)::R(B),XR(a)
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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).