MESON Chess Problem Database

Problem Display
PID: 259483 (8/7B/1p1p4/1P2p1R1/Pq1k3K/B2NNP2/2nP4/1rQR4 w - - 0 1)

Cheylan, Yves

Main-Post, 1973

8/7B/1p1p4/1P2p1R1/Pq1k3K/B2NNP2/2nP4/1rQR4

#2

12 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Rd5#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Sbxc2#
        • 2.Sc6#
      • 1...Kc5
        • 2.d4#
      • 1...Rxc1
        • 2.Sc6#
      • 1...Sxa3
        • 2.Sf5#
        • 2.Sc6#
        • 2.Qc3#
      • 1...Sxe3
        • 2.Qc3#
        • 2.dxe3#
      • 1...Sxb4
        • 2.Qc3#
        • 2.Qc4#
      • 1...Rb2
        • 2.Sc6#
      • 1...Sa1
        • 2.Sf5#
        • 2.Sc6#
        • 2.Qc3#
        • 2.Qc4#
      • 1...Se1
        • 2.Sf5#
        • 2.Sc6#
        • 2.Qc3#
        • 2.Qc4#
      • 1...e4
        • 2.Rd5#
      • 1...Rxb4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Se6#
      • 1...Kc5
        • 2.d4#
      • 1...Qxd2
        • 2.Qxd2#
      • 1...Sxe3
        • 2.dxe3#
      • 1...exf4
        • 2.Rd5#
      • 1...Qb3
        • 2.Se2#
      • 1...Qc4
        • 2.Sf5#
      • 1...e4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATE::R1(K)
  • Tries
    • Try
      • S(E);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);OGATE,P_SPINP(e),P_SPINS(b),S_FLIGHT::P(C)
        • R(a);XQ(A)::S(E)
        • R(a);::S(E)
        • P(e);OGATE::R1(K)
      • Refutation
        • R(a);XS(E)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);OGATE,P_PINS(E),P_SPINP(e),P_SPINQ(c),P_SPINS(b),S_FLIGHT::P(C)
      • Q(c);OGATE,P_SPINQ(c),XP(C)::QAR2(A),XQ(c)
      • S(b);OGATE,XS(F)::R(B)+P(C)DCHECK,XS(b)
      • P(e);OGATE,XS(E)::R1(K)
      • Q(c);::S(E)
      • Q(c);SBLOCK::S(F)
      • P(e);OGATE::R1(K)
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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).