MESON Chess Problem Database

Problem Display
PID: 109945 (8/2b1p3/K2kN2r/Rn2N3/3pP1B1/1b1R1P2/1Q3B2/3r4 w - - 0 1)

Olasz, Imre

2nd Prize, Nepszava, 1930

8/2b1p3/K2kN2r/Rn2N3/3pP1B1/1b1R1P2/1Q3B2/3r4

#2

10 + 8

35 L'Italia Scacchistica 1930
6490 yacpdb 2009
14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qxd4#
    • 1...Sa3
      • 2.Qxa3#
    • 1...Sc3
      • 2.Qa3#
    • 1...Sa7
      • 2.Qa3#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Bc5#
      • 1...Bxe6
        • 2.Qb4#
      • 1...Sxd4
        • 2.Qa3#
      • 1...Sc3
        • 2.Qa3#
      • 1...Rxe6!
    • 1.Qa3+?
      • 1...Kxe5
        • 2.Bxd4#
      • 1...Sxa3!
    • 1.Qxd4+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sxd4!
    • 1.Qxb3?
      • threat
        • 2.Qd5#
      • 1...Sc3
        • 2.Qa3#
        • 2.Qb4#
      • 1...Kxe5!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Sxb5#
      • 1...Kc5+
        • 2.Sdc6#
      • 1...Kxe5+
        • 2.Se6#
      • 1...Sxd4
        • 2.Qa3#
      • 1...e6
        • 2.Sf5#
      • 1...Sa3
        • 2.Sb5#
        • 2.Qxa3#
      • 1...Sc3
        • 2.Qa3#
      • 1...Sa7
        • 2.Sb5#
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(e);P_PINS(J),P_SPINS(d),S_FLIGHT,XS(H)::QAB1(A),XP(c)
    • S(d);N_GUARD::QAB(A),XS(d)
    • S(d);N_GUARD::QAB(A)
  • Tries
    • Try
      • B(B);XP(c)
      • Threat
        • R(C)+B(B),DCHECK
      • Vars
        • B(b);OGATE,XS(J)::QAB(A)
        • S(d);N_GUARD,P_SPINS(d),XB(B)::QAB(A)
        • S(d);N_GUARD::QAB(A)
      • Refutation
        • R(f);XS(J)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);N_SPINP(c),P_PINS(J),P_SPINS(d),S_FLIGHT,XS(H)::B(B),XP(c)
      • Refutation
        • S(d);XQ(A)
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
      • Refutation
        • S(d);P_SPINS(d),XQ(A)
    • Try
      • Q(A);XB(b)
      • Threat
        • QAR1(A)
      • Refutation
        • K(e);N_SPINP(c),P_PINS(J),P_SPINS(d),S_FLIGHT,XS(H)
  • Actual
    • S(J);XP(c)
    • Threat
      • R(C)+S(J),DCHECK,XS(d)
    • Vars
      • K(e);CHECK,P_SPINS(d),S_FLIGHT::B(B)+S(J)
      • K(e);CHECK,P_SPINS(d),S_FLIGHT,XS(H)::QAB(A)+S(J)
      • S(d);N_GUARD,P_SPINS(d),XS(J)::QAB(A)
      • P(h);SBLOCK::R(C)+S(J),DCHECK
      • S(d);N_GUARD::QAB(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).