MESON Chess Problem Database

Problem Display
PID: 180456 (7Q/3KRPr1/1pPB2P1/nP2N3/R1P1kp2/1p3p1B/1P2NP2/8 w - - 0 1)

Lider, Valentin Viktorovich

Schakend Nederland, 1981

7Q/3KRPr1/1pPB2P1/nP2N3/R1P1kp2/1p3p1B/1P2NP2/8

#2

15 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3+?
      • 1...fxg3
        • 2.Qh4#
      • 1...Kd4!
    • 1.Sxf3+?
      • 1...Kd3
        • 2.Bf5#
      • 1...Kxf3!
    • 1.Sg4+?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kd3!
    • 1.Bc5?
      • threat
        • 2.Sc3#
      • 1...fxe2
        • 2.f3#
      • 1...bxc5!
    • 1.Qh5?
      • threat
        • 2.Bf5#
        • 2.Qxf3#
        • 2.Qf5#
      • 1...Rxf7
        • 2.Qxf3#
      • 1...Sxc4
        • 2.Qxf3#
      • 1...fxe2!
    • 1.c5+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Sxf4#
        • 2.Be6#
        • 2.Rd4#
      • 1...Sc4!
  • Keys
    • 1.Sxf4!
      • 1...Kd4
        • 2.Sxf3#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Rxg6
        • 2.Sexg6#
      • 1...Rxf7
        • 2.Sxf7#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sxc6
        • 2.Sxc6#
      • 1...Rh7
        • 2.Sed3#
      • 1...Rg8
        • 2.Sed3#
      • 1...Sb7
        • 2.c5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(d);XS(B)::QAR(O)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(H);CHECK,XP(b)
      • Vars
        • K(c);S_FLIGHT::B(D)
      • Refutation
        • K(c);S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(O)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(J);
      • Threat
        • S(B)
      • Vars
        • P(b);OGATE,XS(B)::P(C)
      • Refutation
        • P(f);XB(J)
    • Try
      • Q(O);
      • Threat
        • DUALS(3)
      • Vars
        • R(g);P_PINR(M),XP(N)::QAB1(O),XP(b)
        • S(e);P_SPINS(e),XP(F)::QAB1(O),XP(b)
      • Refutation
        • P(b);XS(B)
    • Try
      • P(F);CHECK
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • S(B);XP(d)
    • Vars
      • K(c);P-FLIGHT::S(H),XP(b)
      • K(c);OGATEB,P-FLIGHT,XS(B)::QAR2(O)
      • R(g);XP(K)::R(M)+S(H),XR(g)
      • R(g);P_PINR(M),XP(N)::R(M)+S(H),XR(g)
      • S(e);OGATE,P_SPINS(e),XP(F)::R(E),XS(e)
      • S(e);XP(I)::R(M)+S(H),XS(e)
      • R(g);::R(M)+S(H)
      • S(e);N_GUARD::R(E)+P(F)
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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).