MESON Chess Problem Database

Problem Display
PID: 136406 (4r3/1P1B2p1/2P2p2/3kN1b1/R3N1p1/1KBn2P1/1n6/3Q4 w - - 0 1)

Delobel, Bernard

Source?, 0000

4r3/1P1B2p1/2P2p2/3kN1b1/R3N1p1/1KBn2P1/1n6/3Q4

#2

10 + 8

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Rd4#
    • 1...Sxa4
      • 2.Qxd3#
    • 1...Sc4
      • 2.Qxd3#
  • Tries
    • 1.Sxg4?
      • threat
        • 2.Rd4#
      • 1...Sxa4
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Be3
        • 2.Sxe3#
      • 1...Rxe4!
    • 1.Sf7?
      • threat
        • 2.Rd4#
      • 1...Rxe4
        • 2.Ra5#
      • 1...Sxa4
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Be3!
    • 1.b8Q?
      • threat
        • 2.Rd4#
        • 2.Qd6#
        • 2.Qb5#
      • 1...Sxd1
        • 2.Rd4#
        • 2.Qd6#
      • 1...Sxa4
        • 2.Qxd3#
      • 1...fxe5
        • 2.Qd6#
        • 2.Qb5#
      • 1...Sc4
        • 2.Qxd3#
      • 1...Be3
        • 2.Qd6#
      • 1...Re6
        • 2.Rd4#
        • 2.Qb5#
      • 1...Bd2
        • 2.Rd4#
        • 2.Qd6#
      • 1...Rxb8+!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb6#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Rxe4
        • 2.Ra5#
      • 1...Sxa4
        • 2.Qxd3#
      • 1...Sxc4
        • 2.Qxd3#
      • 1...Be3
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(h);SBLOCK,XS(G)::R1(E)
    • S(a);N_GUARD,XR(E)::QAR2(A),XS(b)
    • S(a);N_GUARD::QAR2(A),XS(b)
  • Tries
    • Try
      • S(G);XP(c)
      • Threat
        • R1(E)
      • Vars
        • S(a);N_GUARD,XR(E)::QAR2(A),XS(b)
        • S(a);N_GUARD::QAR2(A),XS(b)
        • B(e);N_GUARD::S(G),XB(e)
      • Refutation
        • R(h);XS(F)
    • Try
      • S(G);
      • Threat
        • R1(E)
      • Vars
        • R(h);SBLOCK,XS(F)::R(E)
        • S(a);N_GUARD,XR(E)::QAR2(A),XS(b)
        • S(a);N_GUARD::QAR2(A),XS(b)
      • Refutation
        • B(e);
    • Try
      • P(I);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);N_GUARD,XR(E)::QAR2(A),XS(b)
        • S(a);N_GUARD::QAR2(A),XS(b)
        • B(e);::QAR1(I)
      • Refutation
        • R(h);CHECK,XQ(I)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);N_SPINS(b),OGATEB,S_FLIGHT,XS(F)::QAB(A)
      • R(h);SBLOCK,XS(F)::R(E)
      • S(a);N_GUARD,XR(E)::QAR2(A),XS(b)
      • S(a);N_GUARD,XS(G)::QAR2(A),XS(b)
      • B(e);N_GUARD::S(G),XB(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).