Problem Display
PID: 5994 (1K1Bk2r/5p1p/8/1b5B/3Q4/3p4/6R1/7r w k - 0 1)

Cuttle, HM

Chess Amateur (The), 1926

1K1Bk2r/5p1p/8/1b5B/3Q4/3p4/6R1/7r

#2

5 + 7


3310 2345 Chess Problems 1997

SOLUTION


  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qxh8#
    • 1...Rg8
      • 2.Rxg8#
    • 1...Bd7
      • 2.Qxh8#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Qxh8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Rf8
        • 2.Qe3#
        • 2.Qe5#
        • 2.Qe4#
      • 1...Rg8
        • 2.Rxg8#
      • 1...Rc1+!
    • 1.Bxf7+?
      • 1...Kf8
        • 2.Qg7#
      • 1...Kxf7!
    • 1.Bh4?
      • threat
        • 2.Qd8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Bd7
        • 2.Qxh8#
      • 1...Rxh4!
    • 1.Re2+?
      • 1...Kf8
        • 2.Qxh8#
      • 1...dxe2!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Qd8#
      • 1...0-0+
        • 2.Bd8#
      • 1...Kf8
        • 2.Qxh8#
      • 1...Bd7
        • 2.Qxh8#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINP(d),P-FLIGHT::QAR2(B),XR(g)
    • R(g);N_GUARD::R(A),XR(g)
    • B(c);SBLOCK::QAR(B),XR(g)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR(B),XR(g)
      • Vars
        • K(f);N_SPINP(d),P-FLIGHT::QAR2(B),XR(g)
        • R(g);N_GUARD::R(A),XR(g)
      • Refutation
        • R(a);CHECK
    • Try
      • B(C);CHECK,XP(d)
      • Vars
        • K(f);P-FLIGHT::QAB1(B)
      • Refutation
        • K(f);P_PINB(E),S_FLIGHT,XB(C)
    • Try
      • B(E);
      • Threat
        • QAR1(B)
      • Vars
        • K(f);N_SPINP(d),P-FLIGHT::QAR2(B),XR(g)
        • B(c);SBLOCK::QAR(B),XR(g)
      • Refutation
        • R(a);XB(E)
    • Try
      • R(A);CHECK
      • Vars
        • K(f);N_SPINP(d),P-FLIGHT::QAR2(B),XR(g)
      • Refutation
        • P(b);XR(A)
  • Actual
    • B(E);
    • Threat
      • QAR1(B)
    • Vars
      • K(f);0-0,CHECK,N_SPINP(d),OGATEB::R(A)+B(E)
      • K(f);N_SPINP(d),P-FLIGHT::QAR2(B),XR(g)
      • B(c);SBLOCK::QAR(B),XR(g)


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).