MESON Chess Problem Database

Problem Display
PID: 137767 (2Q5/1P3p2/1P1p4/1K1k4/1nN2P2/2Pb1RnB/3b1p2/3R4 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1933

2Q5/1P3p2/1P1p4/1K1k4/1nN2P2/2Pb1RnB/3b1p2/3R4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4+
      • 2.Qxc4#
    • 1...Be4
      • 2.Se3#
    • 1...Se4
      • 2.Qf5#
    • 1...Sa2
      • 2.Qc6#
    • 1...Sc2
      • 2.Qc6#
    • 1...Sa6
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Rxd3+?
      • 1...Sxd3
        • 2.Qc6#
      • 1...Ke4!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Rxd3#
      • 1...Bxc4+
        • 2.Qxc4#
      • 1...Ke4
        • 2.Rxf2#
      • 1...Be3
        • 2.Rxg3#
      • 1...Bb1
        • 2.Rd3#
      • 1...Bf1
        • 2.Rd3#
      • 1...Bc2
        • 2.Rd3#
      • 1...Be2
        • 2.Rd3#
      • 1...Be4
        • 2.Se3#
      • 1...Bf5
        • 2.Rd3#
      • 1...Bg6
        • 2.Rd3#
      • 1...Bh7
        • 2.Rd3#
      • 1...Se4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • B(c);CHECK,OGATE,P_SPINB(a),XS(E)::QAB1(J),XB(c)
    • B(c);N_PINS(E),P_SPINB(a),SBLOCK::S(E)
    • S(d);N_GUARD,S_CUTB(c)::QAR2(J)
    • S(e);N_GUARD::QAB1(J)
    • S(e);N_GUARD::QAB1(J),XS(e)
    • P(h);N_GUARD::QAB1(J)
  • Tries
    • Try
      • R(C);CHECK,N_SPINS(E),XB(c)
      • Vars
        • S(e);XR(C)::QAB1(J)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • B(D)+R(C),DCHECK,XB(c)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(a),XS(E)::QAB1(J),XB(c)
      • K(f);S_FLIGHT::B(D)+R(C),XP(b)
      • B(a);P_SPINB(c)::B(D)+R(C),XS(d)
      • B(c);N_PINS(E),P_SPINB(a)::B(D)+R(C),DCHECK
      • B(c);P_SPINB(a)::B(D)+R(C),DCHECK
      • B(c);N_PINS(E),P_SPINB(a),SBLOCK::S(E)
      • S(d);N_GUARD,S_CUTB(c)::QAR2(J)
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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).