MESON Chess Problem Database

Problem Display
PID: 260940 (3Q2bq/4R3/2p1p1p1/8/2Npk2p/1R1pN1P1/KB1P2P1/8 w - - 0 1)

Kozdon, Baldur

1st Comm., Neue Zurcher Zeitung, 2001

3Q2bq/4R3/2p1p1p1/8/2Npk2p/1R1pN1P1/KB1P2P1/8

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Qxd4#
    • 1...Qh6
      • 2.Qxd4#
    • 1...Qh7
      • 2.Qxd4#
    • 1...dxe3
      • 2.Qxd3#
    • 1...c5
      • 2.Qd5#
      • 2.Qa8#
    • 1...e5
      • 2.Sd6#
      • 2.Qxd4#
  • Tries
    • 1.Rb5?
      • threat
        • 2.Sd6#
      • 1...cxb5
        • 2.Qd5#
        • 2.Qa8#
      • 1...Qe5
        • 2.Rxe5#
      • 1...c5
        • 2.Qd5#
        • 2.Qa8#
      • 1...e5
        • 2.Qxd4#
      • 1...hxg3!
    • 1.Rxe6+?
      • 1...Qe5
        • 2.Sd6#
        • 2.Rxe5#
        • 2.Qxh4#
        • 2.Qxd4#
      • 1...Bxe6!
    • 1.Qa5?
      • threat
        • 2.Sd6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...c5
        • 2.Qa8#
      • 1...hxg3!
    • 1.Qd6?
      • threat
        • 2.Qf4#
        • 2.Qxc6#
      • 1...dxe3
        • 2.Qxd3#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qf6
        • 2.Qxc6#
      • 1...Qh5
        • 2.Qf4#
        • 2.Qxd4#
      • 1...Qh6
        • 2.Qe5#
        • 2.Qxd4#
        • 2.Qxc6#
      • 1...c5
        • 2.Qf4#
        • 2.Qd5#
        • 2.Qc6#
      • 1...e5
        • 2.Qxd4#
        • 2.Qxg6#
      • 1...g5
        • 2.Qxc6#
      • 1...hxg3!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Qxd4#
      • 1...Qxg7
        • 2.Qxh4#
      • 1...dxe3
        • 2.Qxd3#
      • 1...c5
        • 2.Qa8#
      • 1...e5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD::QAR1(J),XP(b)
    • P(b);OGATE,XS(F)::QAB1(J),XP(a)
  • Tries
    • Try
      • R(E);
      • Threat
        • S(H)
      • Vars
        • Q(i);N_GUARD,N_SPINP(f)::R1(E),XQ(i)
        • P(f);P_PINS(H),S_CUTQ(i)::QAR1(J),XP(b)
      • Refutation
        • P(d);XP(G)
    • Try
      • R(I);CHECK,XP(f)
      • Refutation
        • B(h);XR(I)
    • Try
      • Q(J);
      • Threat
        • S(H)
      • Vars
        • Q(i);N_GUARD,N_SPINP(f)::QAR1(J),XQ(i)
        • P(e);OGATEB::QAB(J)
      • Refutation
        • P(d);XP(G)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,XS(F)::QAB1(J),XP(a)
        • Q(i);N_GUARD,N_SPINP(f)::QAR1(J),XQ(i)
        • Q(i);::QAB(J),XP(e)
        • P(g);::QAB(J),XP(e)
      • Refutation
        • P(d);XP(G)
  • Actual
    • R(I);N_PINP(f)
    • Threat
      • QAR1(J),XP(b)
    • Vars
      • Q(i);N_GUARD,XR(I)::QAR(J),XP(d)
      • P(b);OGATE,XS(F)::QAB1(J),XP(a)
      • P(e);OGATEB::QAB(J)
      • P(f);SBLOCK::S(H)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).