MESON Chess Problem Database

Problem Display
PID: 16171 (8/Q1p4p/n1p2P2/r1q1NK1N/p4Rp1/3B1n2/R2B1kpp/1r4b1 w - - 0 1)

Kovacevic, Marjan

StrateGems, 2000

8/Q1p4p/n1p2P2/r1q1NK1N/p4Rp1/3B1n2/R2B1kpp/1r4b1

#2

9 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qd4
      • 2.Qxd4#
    • 1...g3
      • 2.Rxf3#
  • Tries
    • 1.Kxg4?
      • threat
        • 2.Rxf3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Rb4!
    • 1.Ke6?
      • threat
        • 2.Sxg4#
      • 1...Qe3
        • 2.Qxe3#
      • 1...g3
        • 2.Sg4#
        • 2.Rxf3#
      • 1...Re1!
    • 1.Be1+?
      • 1...Ke3
        • 2.Re2#
        • 2.Re4#
      • 1...Kxe1!
    • 1.Bc3+?
      • 1...Ke3
        • 2.Re2#
        • 2.Re4#
      • 1...Rb2!
    • 1.Be3+?
      • 1...Kxe3
        • 2.Re2#
        • 2.Re4#
      • 1...Ke1!
    • 1.Bb4+?
      • 1...Ke3
        • 2.Re2#
        • 2.Re4#
      • 1...Rb2!
    • 1.Bxa5+?
      • 1...Ke3
        • 2.Re2#
        • 2.Re4#
      • 1...Rb2!
    • 1.Qxc5+?
      • 1...Sxc5
        • 2.Sxg4#
      • 1...Rxc5!
  • Keys
    • 1.Ke4!
      • threat
        • 2.Sxg4#
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Re1+
        • 2.Be3#
      • 1...Rb4+
        • 2.Bxb4#
      • 1...g3
        • 2.Sg4#
        • 2.Rxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(j);OGATE::QAB1(I),XQ(j)
    • Q(j);OGATE::QAB(I),XQ(j)
    • P(h);N_GUARD::R1(D),XS(f)
  • Tries
    • Try
      • K(F);N_SPINS(E),S_FLIGHT,XP(h)
      • Threat
        • R1(D),XS(f)
      • Vars
        • Q(j);OGATE,P_PINR(D)::QAB(I),XQ(j)
      • Refutation
        • R(a);P_PINR(D)
    • Try
      • K(F);N_SPINS(E),S_FLIGHT
      • Threat
        • S(E),XP(h)
      • Vars
        • Q(j);OGATE,P_PINS(E)::QAB1(I),XQ(j)
      • Refutation
        • R(a);P_PINS(E)
    • Try
      • B(B);CHECK
      • Refutation
        • K(c);N_SPINQ(j),N_SPINS(f),S_FLIGHT,XB(B)
    • Try
      • B(B);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • B(B);CHECK,N_PINQ(j)
      • Refutation
        • K(c);N_SPINS(f),S_FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • B(B);CHECK,XR(i)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(I);CHECK,N_SPINS(E),XQ(j)
      • Vars
        • S(k);XQ(I)::S(E),XP(h)
      • Refutation
        • R(i);P_PINS(E),XQ(I)
  • Actual
    • K(F);N_SPINS(E),S_FLIGHT
    • Threat
      • S(E),XP(h)
    • Vars
      • Q(j);CHECK,OGATE::QAB1(I),XQ(j)
      • Q(j);CHECK,OGATE::QAB(I),XQ(j)
      • R(a);CHECK,SBLOCK::R(A)+B(B),DCHECK
      • R(a);CHECK,N_GUARD::R(A)+B(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).