MESON Chess Problem Database

Problem Display
PID: 11337 (1N5K/2Q1p2p/2p4r/r2kP1p1/1p1p2N1/1Pq2R2/4PBB1/1b6 w - - 0 1)

Evans, TC

Chess, 1938

1N5K/2Q1p2p/2p4r/r2kP1p1/1p1p2N1/1Pq2R2/4PBB1/1b6

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qxa5#
    • 1...Ke6
      • 2.Qd7#
    • 1...d3
      • 2.Rf6#
  • Tries
    • 1.Rd3+?
      • 1...Kc5
        • 2.Qxa5#
      • 1...Ke6!
    • 1.Rf6+?
      • 1...Kc5
        • 2.Qxa5#
        • 2.Qxc6#
      • 1...Qf3
        • 2.Qxc6#
      • 1...Be4!
  • Keys
    • 1.e6!
      • threat
        • 2.Qe5#
      • 1...d3+
        • 2.Rf6#
      • 1...Ke4
        • 2.Rf4#
      • 1...Kc5
        • 2.Qxc6#
      • 1...Kxe6
        • 2.Qd7#
      • 1...Qxb3
        • 2.Qxc6#
      • 1...Rxe6
        • 2.Rf5#
      • 1...Qe3
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(f);P-FLIGHT,P_SPINP(d)::QAR2(H),XR(e)
    • K(f);S_FLIGHT::QAB1(H)
    • P(d);P_PINP(G),S_CUTB(a),S_CUTQ(b)::B(C)+R(E)
  • Tries
    • Try
      • R(E);CHECK,P_PINP(d)
      • Vars
        • K(f);P-FLIGHT::QAR2(H),XR(e)
      • Refutation
        • K(f);N_SPINP(d),S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(H),XP(h)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • P(G);
    • Threat
      • QAR1(H)
    • Vars
      • P(d);CHECK,S_CUTB(a),S_CUTQ(b)::B(C)+R(E)
      • K(f);S_FLIGHT::B(C)+R(E),DCHECK
      • K(f);P-FLIGHT,P_SPINP(d)::QAR1(H),XP(h)
      • K(f);S_FLIGHT,XP(G)::QAB1(H)
      • Q(b);N_GUARD,XP(D)::QAB1(H),XP(h)
      • R(i);SBLOCK,XP(G)::B(C)+R(E),DCHECK
      • Q(b);N_GUARD::QAB1(H),XP(h)
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).