MESON Chess Problem Database

Problem Display
PID: 95735 (4R1B1/2n2r2/2Kp4/4b1p1/1p1k1PR1/3p4/Nn1P4/B4Q2 w - - 0 1)

Kofman, Rafael Moiseevich

L'Italia Scacchistica, 1931

4R1B1/2n2r2/2Kp4/4b1p1/1p1k1PR1/3p4/Nn1P4/B4Q2

#2

9 + 9

6490 yacpdb 2009
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.f5#
    • 1...Rd7
      • 2.fxe5#
    • 1...Rg7
      • 2.fxe5#
    • 1...Rh7
      • 2.fxe5#
    • 1...Bf6
      • 2.fxg5#
      • 2.f5#
    • 1...Bg7
      • 2.f5#
    • 1...Bh8
      • 2.f5#
  • Tries
    • 1.Sxb4?
      • threat
        • 2.Qxd3#
      • 1...Ke4
        • 2.f5#
      • 1...Kc4!
    • 1.Bxb2+?
      • 1...Ke4
        • 2.f5#
      • 1...Kc4!
    • 1.Qf2+?
      • 1...Ke4
        • 2.f5#
      • 1...Kc4!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Qxd3#
      • 1...Kc4
        • 2.fxe5#
      • 1...Ke4
        • 2.f5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(d);N_SPINS(a),P-FLIGHT,P_SPINB(e)::R(F)+P(E)
    • R(i);N_GUARD::R(F)+P(E),XB(e)
    • B(e);N_GUARD::R(F)+P(E)
  • Tries
    • Try
      • S(C);XP(c)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(d);N_SPINS(a),P-FLIGHT,P_SPINB(e)::R(F)+P(E)
      • Refutation
        • K(d);N_SPINS(a),P-FLIGHT,P_SPINP(b),P_SPINR(i)
    • Try
      • B(A);CHECK,XS(a)
      • Vars
        • K(d);P-FLIGHT,P_SPINB(e)::R(F)+P(E)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(b),P_SPINR(i)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_SPINS(a),P-FLIGHT,P_SPINB(e)::R(F)+P(E)
      • Refutation
        • K(d);N_SPINS(a),P-FLIGHT,P_SPINR(i)
  • Actual
    • S(C);
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(d);N_SPINS(a),P-FLIGHT,P_SPINP(b),P_SPINR(i)::R(F)+P(E),XB(e)
      • K(d);N_SPINS(a),P-FLIGHT,P_SPINB(e)::R(F)+P(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).