MESON Chess Problem Database

Problem Display
PID: 274914 (KB2B3/2rQp3/4pp1R/2b1k2q/2p1p3/2p1p1P1/b2N1N1n/3R4 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Sachova skladba, 2023

KB2B3/2rQp3/4pp1R/2b1k2q/2p1p3/2p1p1P1/b2N1N1n/3R4

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Rxh5#
    • 1...f5
      • 2.Rxe6#
  • Tries
    • 1.Sxc4+?
      • 1...Kf5
        • 2.Rd5#
        • 2.Rxh5#
      • 1...Bxc4!
    • 1.Bxc7+?
      • 1...Kf5
        • 2.Rxh5#
      • 1...Bd6!
    • 1.Qxe6+?
      • 1...Kd4
        • 2.Sb3#
        • 2.Sf3#
        • 2.Qxe4#
      • 1...Kxe6!
    • 1.Qd4+?
      • 1...Kxd4
        • 2.Sf3#
      • 1...Kf5
        • 2.Rxh5#
      • 1...Bxd4!
    • 1.Qxc7+?
      • 1...Kd4
        • 2.Sb3#
        • 2.Sf3#
      • 1...Kf5
        • 2.Rxh5#
        • 2.Qf4#
      • 1...Bd6
        • 2.Qc5#
      • 1...Kd5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxc5#
      • 1...Kd4
        • 2.Sf3#
      • 1...Kd5
        • 2.Sf3#
      • 1...Kf5
        • 2.Rxh5#
      • 1...Kd6
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(h);N_SPINR(l),P-FLIGHT,P_SPINP(j),S_CUTP(k)::R(E),XQ(i)
    • P(k);OGATE,SBLOCK::R1(E),XP(j)
  • Tries
    • Try
      • S(B);CHECK,XP(e)
      • Refutation
        • B(a);XS(B)
    • Try
      • B(H);CHECK,XR(l)
      • Vars
        • K(h);P-FLIGHT,P_SPINP(j)::R(E),XQ(i)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • Q(F);CHECK,XP(j)
      • Refutation
        • K(h);N_SPINR(l),P-FLIGHT,P_SPINP(k),XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);N_GUARD,N_SPINR(l),S_FLIGHT,XQ(F)::R(A)+S(B),DCHECK
        • K(h);N_GUARD,N_SPINR(l),P-FLIGHT::R(E),XQ(i)
      • Refutation
        • B(g);XQ(F)
    • Try
      • Q(F);CHECK,XR(l)
      • Vars
        • B(g);P_SPINB(g)::QAR2(F)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • Q(F);P_PINB(g)
    • Threat
      • QAR2(F),XB(g)
    • Vars
      • K(h);N_GUARD,N_SPINB(g),N_SPINR(l),S_FLIGHT::R(A)+S(B),DCHECK
      • K(h);N_GUARD,N_SPINR(l),P-FLIGHT,S_CUTP(f),S_CUTQ(i),S_CUTS(b)::R(A)+S(B)
      • K(h);N_GUARD,N_SPINR(l),P-FLIGHT,S_CUTP(k)::R(E),XQ(i)
      • K(h);N_GUARD,N_SPINB(g),S_FLIGHT::R(A)+S(B),DCHECK,XP(e)
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).