MESON Chess Problem Database

Problem Display
PID: 261053 (K2bB3/p7/2NBr3/p1p5/k3q1R1/NR5b/P1P1P3/3Q4 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Neue Zurcher Zeitung, 2001

K2bB3/p7/2NBr3/p1p5/k3q1R1/NR5b/P1P1P3/3Q4

#2

11 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Se7#
    • 1...Qc4
      • 2.Se7#
      • 2.Rxc4#
    • 1...Qd4
      • 2.Se7#
    • 1...Qf4
      • 2.Se7#
    • 1...Qxg4
      • 2.Se7#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sb2#
      • 1...Qxc6+
        • 2.Bxc6#
      • 1...Qxc4
        • 2.Se7#
        • 2.Rxc4#
      • 1...Bf6!
    • 1.Rxe4+?
      • 1...c4
        • 2.Se7#
        • 2.Rxc4#
      • 1...Rxe4!
    • 1.c4?
      • threat
        • 2.Rd3#
      • 1...Qxc6+
        • 2.Bxc6#
      • 1...Qxe2
        • 2.Se7#
      • 1...Qb1
        • 2.Se7#
      • 1...Qc2
        • 2.Se7#
      • 1...Qd3
        • 2.Se7#
        • 2.Rxd3#
      • 1...Qh1!
  • Keys
    • 1.Rd3!
      • threat
        • 2.c4#
      • 1...Qb4
        • 2.Se7#
      • 1...Qc4
        • 2.Rxc4#
      • 1...c4
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_PINS(H)::B(K)+S(H)
    • Q(c);N_PINS(H),N_SPINQ(c),XR(G)::B(K)+S(H)
  • Tries
    • Try
      • S(E);N_PINQ(c)
      • Threat
        • S(E)
      • Vars
        • Q(c);CHECK,OGATE,P_SPINQ(c),XS(H)::B(K),XQ(c)
      • Refutation
        • B(h);
    • Try
      • R(G);CHECK,N_SPINS(H),XQ(c)
      • Refutation
        • R(f);XR(G)
    • Try
      • P(C);N_PINQ(c)
      • Threat
        • QAB(A)+R(F)
      • Vars
        • Q(c);CHECK,OGATE,P_SPINQ(c),XS(H)::B(K),XQ(c)
        • Q(c);N_PINS(H),XP(D)::B(K)+S(H)
        • Q(c);N_PINS(H)::B(K)+S(H)
      • Refutation
        • Q(c);
  • Actual
    • R(F);
    • Threat
      • QAB(A)+P(C)
    • Vars
      • Q(c);N_PINS(H)::B(K)+S(H)
      • Q(c);N_PINS(H),OGATE::R(G),XQ(c)
      • P(e);N_SPINQ(c)::QAB(A)+P(C)
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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).