MESON Chess Problem Database

Problem Display
PID: 227819 (8/8/2p1Rp1b/2N3Q1/PPk2pp1/2B5/3KN1q1/5B2 w - - 0 1)

Cristoffanini, Guido

Magyar Sakkvilag, 1926

8/8/2p1Rp1b/2N3Q1/PPk2pp1/2B5/3KN1q1/5B2

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf1
      • 2.Re4#
    • 1...Qh1
      • 2.Sg1#
    • 1...Qh3
      • 2.Re4#
    • 1...Qe4
      • 2.Rxe4#
    • 1...Qd5+
      • 2.Sd4#
    • 1...Qg1
      • 2.Sxg1#
    • 1...Qxe2+
      • 2.Bxe2#
    • 1...Qh2
      • 2.Re4#
    • 1...Qg3
      • 2.Sxg3#
      • 2.Re4#
    • 1...f3
      • 2.Re4#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Rd4#
      • 1...Qd5+
        • 2.Sd4#
      • 1...Qxe2+
        • 2.Bxe2#
      • 1...Qg1
        • 2.Sxg1#
        • 2.Qg8#
      • 1...Qf2
        • 2.Qg8#
      • 1...Qe4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Re4#
      • 1...Qd5+
        • 2.Sd4#
      • 1...Qxe2+
        • 2.Rxe2#
      • 1...f3+
        • 2.Re3#
      • 1...Kd5
        • 2.Rxf6#
      • 1...Qe4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD,N_PINS(C),XB(A)::R(I)
    • Q(a);N_PINS(C)::B(A)+S(C)
    • Q(a);N_GUARD,N_PINS(C)::R(I)
    • Q(a);N_GUARD,N_PINS(C)::R(I),XQ(a)
    • Q(a);CHECK,N_PINS(C)::B(A)+S(C)
    • Q(a);N_PINS(C)::B(A)+S(C),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
    • Q(a);N_GUARD::R(I)
    • P(c);P_PINQ(H),S_CUTQ(a)::R(I)
  • Tries
    • Try
      • R(I);
      • Threat
        • R1(I)
      • Vars
        • Q(a);CHECK,N_PINS(C)::B(A)+S(C)
        • Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
        • Q(a);N_GUARD::QAB(H)
      • Refutation
        • Q(a);N_PINS(C)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+R(I),DCHECK
    • Vars
      • Q(a);CHECK,N_PINS(C),SBLOCK::B(A)+S(C)
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::QAB(H)+R(I),XQ(a)
      • P(c);CHECK,S_CUTQ(a)::QAB(H)+R(I)
      • K(b);S_FLIGHT::QAB(H)+R(I),XP(f)
      • Q(a);N_PINS(C)::QAB(H)+R(I),DCHECK,XQ(a)
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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).