MESON Chess Problem Database

Problem Display
PID: 108043 (1q6/4N3/2R1bQ2/3Pp1R1/3k4/n2N2K1/2p1PpB1/2Bn1r2 w - - 0 1)

Farion, Petro Petrovich

Torre & Cavallo - Scacco!, 2000

1q6/4N3/2R1bQ2/3Pp1R1/3k4/n2N2K1/2p1PpB1/2Bn1r2

#2

10 + 9

6490 yacpdb 2009
5454 Near Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Qxe5#
    • 1...Qb1
      • 2.Qxe5#
    • 1...Qb2
      • 2.Qxe5#
    • 1...Qb3
      • 2.Qxe5#
    • 1...Qb4
      • 2.Qxe5#
    • 1...Qb5
      • 2.Qxe5#
    • 1...Qb6
      • 2.Qxe5#
    • 1...Qb7
      • 2.Qxe5#
    • 1...Qa8
      • 2.Qxe5#
    • 1...Qc8
      • 2.Qxe5#
    • 1...Qd8
      • 2.Qxe5#
    • 1...Qe8
      • 2.Qxe5#
    • 1...Qf8
      • 2.Qxe5#
    • 1...Qg8
      • 2.Qxe5#
    • 1...Bg4
      • 2.Rxg4#
    • 1...Bxd5
      • 2.Sf5#
    • 1...Bf5
      • 2.Sxf5#
    • 1...Bf7
      • 2.Sf5#
      • 2.Rg4#
    • 1...Bg8
      • 2.Sf5#
      • 2.Rg4#
  • Tries
    • 1.Rxe5?
      • threat
        • 2.Qf4#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Qg8+
        • 2.Rg5#
      • 1...Bxd5
        • 2.Sf5#
      • 1...Qf8
        • 2.Re4#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Sc3
        • 2.Be3#
      • 1...Sc4!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Qf4#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Qb3+
        • 2.Sd3#
      • 1...Bxd5
        • 2.Sf5#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Qf8
        • 2.Sf7#
      • 1...Bf5
        • 2.Sxf5#
      • 1...Sc3
        • 2.e3#

Anticipated by 154167(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(i);N_GUARD::QAB1(I),XP(g)
    • Q(i);N_GUARD,P_PINS(D)::QAB1(I),XP(g)
    • Q(i);N_GUARD,P_PINR(G)::QAB1(I),XP(g)
    • B(h);N_GUARD::R(G),XB(h)
    • B(h);N_GUARD,XP(F)::S(J)
    • B(h);N_GUARD::S(J),XB(h)
  • Tries
    • Try
      • R(G);P_SPINR(G),XP(g)
      • Threat
        • QAR2(I)
      • Vars
        • Q(i);CHECK,OGATE,P_SPINQ(i),XR(G)::QAB1(I),XQ(i)
        • Q(i);CHECK,N_PINR(G)::QAB(I)+R(G)
        • B(h);N_GUARD,XP(F)::S(J)
        • Q(i);N_PINR(G)::QAB(I)+R(G),DCHECK
        • B(h);N_GUARD::S(J),XB(h)
        • S(a);N_GUARD::B(A)
      • Refutation
        • S(e);
  • Actual
    • S(D);P_SPINS(D),XP(g)
    • Threat
      • QAR2(I)
    • Vars
      • Q(i);CHECK,OGATE,P_SPINQ(i),XS(D)::QAB1(I),XQ(i)
      • Q(i);CHECK,N_PINS(D)::QAB(I)+S(D)
      • B(h);N_GUARD,XP(F)::S(J)
      • S(e);N_GUARD::R1(H),XS(e)
      • Q(i);N_PINS(D)::QAB(I)+S(D)
      • B(h);N_GUARD::S(J),XB(h)
      • S(a);N_GUARD::P(B)
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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).