MESON Chess Problem Database

Problem Display
PID: 263825 (8/5K2/N7/1P1pk3/3Rp3/4b1P1/2P1B2B/7Q w - - 0 1)

Anonymous

Tijdschrift vd NSB, 1894

8/5K2/N7/1P1pk3/3Rp3/4b1P1/2P1B2B/7Q

#2

9 + 4

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
    • 1...Kf5
      • 2.Rxd5#
    • 1...Bxd4
      • 2.g4#
  • Tries
    • 1.Qxe4+?
      • 1...Kd6
        • 2.Rxd5#
        • 2.Qxd5#
        • 2.Qe6#
        • 2.Qe7#
      • 1...dxe4!
    • 1.Qd1?
      • threat
        • 2.Rxd5#
      • 1...Kf5
        • 2.Rxd5#
      • 1...Kd6
        • 2.Rxd5#
      • 1...Bxd4
        • 2.g4#
      • 1...Bd2!
    • 1.g4+?
      • 1...Kxd4
        • 2.Qa1#
      • 1...Bf4!
  • Keys
    • 1.c4!
      • threat
        • 2.Rxd5#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kf5
        • 2.Rxd5#
      • 1...Kd6
        • 2.Rxd5#
      • 1...Bxd4
        • 2.g4#
      • 1...dxc4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XR(F)::QAB(A)
    • K(d);N_GUARD,P-FLIGHT::R(F),XP(c)
    • B(a);N_GUARD,SBLOCK,XR(F)::B(D)+P(E)
  • Tries
    • Try
      • Q(A);CHECK,XP(b)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Threat
        • R1(F),XP(c)
      • Vars
        • K(d);P-FLIGHT::R(F),XP(c)
        • K(d);P_SPINP(c),S_FLIGHT::R1(F),XP(c)
        • B(a);N_GUARD,XR(F)::B(D)+P(E)
      • Refutation
        • B(a);
    • Try
      • P(E);CHECK
      • Vars
        • K(d);S_CUTB(a),S_FLIGHT,XR(F)::QAB(A)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • P(B);
    • Threat
      • R1(F),XP(c)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB(A)
      • K(d);P-FLIGHT::R(F),XP(c)
      • K(d);P_SPINP(c),S_FLIGHT::R1(F),XP(c)
      • B(a);N_GUARD,SBLOCK,XR(F)::B(D)+P(E)
      • P(c);N_GUARD,XP(B)::QAR1(A),XP(b)
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).