MESON Chess Problem Database

Problem Display
PID: 95783 (8/8/8/5R2/5n2/5k2/5b2/5BQK w - - 0 1)

Stocchi, Ottavio

L'Italia Scacchistica, 1941

8/8/8/5R2/5n2/5k2/5b2/5BQK

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qg2#
  • Tries
    • 1.Rxf4+?
      • 1...Ke3
        • 2.Qxf2#
      • 1...Kxf4!
    • 1.Qxf2+?
      • 1...Ke4
        • 2.Qxf4#
      • 1...Kg4
        • 2.Qxf4#
      • 1...Kxf2!
    • 1.Qg4+?
      • 1...Ke3
        • 2.Qxf4#
      • 1...Ke4
        • 2.Qxf4#
      • 1...Kxg4!
    • 1.Qg5?
      • threat
        • 2.Qxf4#
      • 1...Ke3
        • 2.Qxf4#
      • 1...Ke4
        • 2.Qxf4#
      • 1...Be3
        • 2.Qg2#
      • 1...Bg3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxf4#
      • 1...Ke3
        • 2.Qxf4#
      • 1...Ke4
        • 2.Qxf4#
      • 1...Kg4
        • 2.Qxf4#
      • 1...Be3
        • 2.Qg2#
      • 1...Bg3
        • 2.Qe2#

Anticipated by 53000(1881), 189667(1911)

This anticipates 160662(1996)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAB1(B)
  • Tries
    • Try
      • R(D);CHECK,XS(c)
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • K(b);N_SPINS(c),OGATE,S_FLIGHT::QAR1(B),XS(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::QAB1(B),XS(c)
        • K(b);S_FLIGHT::QAR1(B),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XS(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(B),XS(c)
        • K(b);N_SPINS(c),S_FLIGHT::QAR1(B),XS(c)
        • B(a);SBLOCK::QAB1(B)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XS(c)
    • Vars
      • K(b);N_SPINS(c),P-FLIGHT::QAB1(B),XS(c)
      • K(b);N_SPINS(c),S_FLIGHT::QAR1(B),XS(c)
      • B(a);SBLOCK::QAB1(B)
      • B(a);OGATE,SBLOCK::QAB1(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).