MESON Chess Problem Database

Problem Display
PID: 29874 (qB1b1Q1K/3p2nN/pRn1k2p/r3p1r1/2Pp2P1/1B1N4/8/8 w - - 0 1)

Stocchi, Ottavio

3rd Prize, Die Schwalbe 085. TT, 1947-1948

qB1b1Q1K/3p2nN/pRn1k2p/r3p1r1/2Pp2P1/1B1N4/8/8

#2

9 + 12

3100 Selected Stocchi (I) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc5#
    • 1...Ra2
      • 2.Sc5#
    • 1...Ra3
      • 2.Sc5#
    • 1...Ra4
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rd5
      • 2.cxd5#
    • 1...Bxb6
      • 2.Qf6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bc7
      • 2.Qf6#
    • 1...Be7
      • 2.Qg8#
    • 1...e4
      • 2.Sf4#
  • Tries
    • 1.Qe8+?
      • 1...Be7
        • 2.Qg8#
      • 1...Sxe8!
  • Keys
    • 1.Bd6!
      • threat
        • 2.c5#
      • 1...Ra3
        • 2.Sc5#
      • 1...Ra4
        • 2.Sc5#
      • 1...Rb5
        • 2.cxb5#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Rd5
        • 2.cxd5#
      • 1...Sb4
        • 2.Qg8#
      • 1...Sa7
        • 2.Qg8#
      • 1...Se7
        • 2.Qf6#
      • 1...Sb8
        • 2.Qg8#
      • 1...e4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::S(B)
    • R(b);N_GUARD::S(B),XR(b)
    • R(b);OGATE::P(C),XR(b)
    • B(l);N_GUARD,N_SPINS(f),XR(E)::QAR1(H)
    • B(l);N_GUARD::QAR1(H),XB(l)
    • B(l);N_GUARD::QAR1(H)
    • B(l);SBLOCK::QAB(H)
    • P(c);N_GUARD::S(B)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • B(l);P_SPINB(l),SBLOCK::QAB(H)
      • Refutation
        • S(j);XQ(H)
  • Actual
    • B(G);N_PINS(f)
    • Threat
      • B(A)+P(C)
    • Vars
      • R(b);N_GUARD::S(B)
      • R(b);OGATE::B(A)+P(C),XR(b)
      • R(b);N_GUARD::S(B),XR(b)
      • R(b);OGATE::P(C),XR(b)
      • S(f);::QAB(H)
      • S(f);S_CUTB(l)::QAR1(H)
      • P(c);N_GUARD::S(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).