MESON Chess Problem Database

Problem Display
PID: 267858 (4RBN1/7K/5P1p/1PPk1N2/2pp1nQq/1p3p2/1bb1P3/3Rn3 w - - 0 1)

Bohm, Ferenc

Highly Comm., El Diluvio, 1932-1933

4RBN1/7K/5P1p/1PPk1N2/2pp1nQq/1p3p2/1bb1P3/3Rn3

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Sxf6#
    • 1...Bc1
      • 2.Rxd4#
    • 1...Ba3
      • 2.Rxd4#
    • 1...Bxf5+
      • 2.Qxf5#
    • 1...Sed3
      • 2.Qxf3#
    • 1...Sg6
      • 2.Se3#
    • 1...c3
      • 2.Rxd4#
    • 1...d3
      • 2.e4#
  • Tries
    • 1.Qxf3+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Sxf3!
    • 1.Qxf4?
      • threat
        • 2.Re5#
        • 2.Qe5#
        • 2.Qd6#
      • 1...Bxf5+
        • 2.Qxf5#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...c3
        • 2.Rxd4#
      • 1...Qg3
        • 2.Re5#
      • 1...Qh2
        • 2.Re5#
      • 1...Sd3
        • 2.Qd6#
      • 1...d3
        • 2.Se3#
        • 2.Qd6#
        • 2.e4#
      • 1...Qxf4!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Re5#
      • 1...Bxf5+
        • 2.Qxf5#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...c3
        • 2.Rxd4#
      • 1...Sed3
        • 2.Qxf3#
      • 1...Sfd3
        • 2.Sfe7#
      • 1...Se6
        • 2.Se7#
      • 1...Sg6
        • 2.Se3#
      • 1...d3
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(i);XP(G)::S(K),XQ(i)
    • B(b);N_GUARD::R1(A),XP(g)
    • B(c);CHECK,OGATE,XS(F)::QAR2(C),XB(c)
    • S(a);N_GUARD,N_PINS(F),N_SPINP(g),S_CUTB(c)::QAB(C),XP(e)
    • S(h);N_PINS(F)::S(F)
    • P(f);S_CUTB(b)::R1(A),XP(g)
    • P(g);N_PINS(F),S_CUTB(c)::P(B)
  • Tries
    • Try
      • Q(C);CHECK,XP(e)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(C),XB(c)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);XS(h)
      • Threat
        • DUALS(3)
      • Vars
        • B(c);CHECK,OGATE,XS(F)::QAR2(C),XB(c)
        • Q(i);XP(G)::S(K),XQ(i)
        • P(f);S_CUTB(b)::R1(A),XP(g)
        • Q(i);::R1(I)
        • S(a);N_PINS(F),N_SPINP(g)::QAR1(C)
      • Refutation
        • Q(i);XQ(C)
  • Actual
    • B(J);
    • Threat
      • R1(I)
    • Vars
      • B(c);CHECK,OGATE,XS(F)::QAR2(C),XB(c)
      • Q(i);XP(G)::S(K),XQ(i)
      • P(f);S_CUTB(b)::R1(A),XP(g)
      • S(a);N_GUARD,N_PINS(F),N_SPINP(g),S_CUTB(c)::QAB(C),XP(e)
      • S(h);N_PINS(F),N_SPINP(g)::S(F)
      • S(h);SBLOCK::S(K)
      • S(h);N_PINS(F)::S(F)
      • P(g);N_PINS(F),S_CUTB(c)::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).