MESON Chess Problem Database

Problem Display
PID: 101657 (3R1N2/1b2pp2/1Rp1P1PN/4k2p/2r1p2B/2P1K3/1Q4P1/8 w - - 0 1)

Pasture, Pascal

diagrammes, 1989

3R1N2/1b2pp2/1Rp1P1PN/4k2p/2r1p2B/2P1K3/1Q4P1/8

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3+
      • 2.Qxc3#
    • 1...Ra4
      • 2.c4#
    • 1...Rb4
      • 2.cxb4#
    • 1...Rd4
      • 2.cxd4#
    • 1...Rc5
      • 2.c4#
    • 1...f5
      • 2.Sf7#
    • 1...f6
      • 2.Bg3#
  • Tries
    • 1.Rd5+?
      • 1...cxd5
        • 2.Sd7#
      • 1...Kxd5!
    • 1.Qf2?
      • threat
        • 2.Sxf7#
        • 2.Bg3#
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qf5#
      • 1...fxe6
        • 2.Sf7#
        • 2.Bg3#
        • 2.Qg3#
        • 2.Qf4#
      • 1...fxg6
        • 2.Sf7#
        • 2.Bg3#
        • 2.Qg3#
        • 2.Qf4#
      • 1...f5
        • 2.Sf7#
        • 2.Qf4#
        • 2.Qxf5#
      • 1...f6
        • 2.Sf7#
        • 2.Bg3#
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qf5#
      • 1...Rxc3+!
    • 1.g4?
      • threat
        • 2.Sxf7#
        • 2.Qh2#
      • 1...Rxc3+
        • 2.Qxc3#
      • 1...fxe6
        • 2.Sf7#
        • 2.Qh2#
      • 1...fxg6
        • 2.Sf7#
        • 2.Qh2#
      • 1...f5
        • 2.Sf7#
      • 1...f6
        • 2.Sf7#
        • 2.Bg3#
        • 2.Qh2#
      • 1...hxg4!
  • Keys
    • 1.Rxc6!
      • 1...Rxc3+
        • 2.Qxc3#
      • 1...Rxc6
        • 2.c4#
      • 1...Bxc6
        • 2.Qb8#
      • 1...fxe6
        • 2.Rxe6#
      • 1...fxg6
        • 2.Sxg6#
      • 1...Ra4
        • 2.Qb5#
        • 2.c4#
      • 1...Rb4
        • 2.cxb4#
      • 1...Rd4
        • 2.cxd4#
      • 1...Rc5
        • 2.c4#
      • 1...Ba6
        • 2.Qb8#
      • 1...Ba8
        • 2.Qb8#
      • 1...Bc8
        • 2.Qb8#
      • 1...f5
        • 2.Sf7#
      • 1...f6
        • 2.Bg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
    • R(a);OGATE::QAB(A)+P(C)
    • R(a);OGATE::QAB(A)+P(C),XR(a)
    • R(a);OGATE::P(C),XR(a)
    • P(h);SBLOCK::S(I)
    • P(h);SBLOCK::B(E)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • P(e);SBLOCK,XR(J)::S(K)
      • Refutation
        • K(c);P-FLIGHT,XR(J)
    • Try
      • Q(A);
      • Threat
        • DUALS(5)
      • Refutation
        • R(a);CHECK,XP(C)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
        • P(h);::S(I)
      • Refutation
        • P(d);XP(B)
  • Actual
    • R(F);XP(e)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XP(C)::QAB(A),XR(a)
      • R(a);OGATE,XR(F)::QAB(A)+P(C)
      • B(f);OGATE,XR(F)::QAB(A)
      • P(h);OGATE,XP(G)::R1(F),XP(h)
      • P(h);XP(H)::S(K),XP(h)
      • R(a);OGATE::QAB(A)+P(C),XR(a)
      • R(a);OGATE::P(C),XR(a)
      • R(a);OGATE::QAB(A)+P(C)
      • B(f);OGATE::QAB(A)
      • P(h);SBLOCK::S(I)
      • P(h);SBLOCK::B(E)
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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).