MESON Chess Problem Database

Problem Display
PID: 225439 (4K3/4p2B/1P2P1n1/pRB5/2k5/1Rp1p1n1/1Pp1p1Q1/2rb4 w - - 0 1)

Degener, Udo

Praca, 1993

4K3/4p2B/1P2P1n1/pRB5/2k5/1Rp1p1n1/1Pp1p1Q1/2rb4

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd5#
    • 1...Sf1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sh5
      • 2.Qe4#
  • Tries
    • 1.Ba3?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd5#
      • 1...Kd4
        • 2.Qd5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf4!
    • 1.Bd6?
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Qd5#
      • 1...Kd4
        • 2.Qd5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf4!
    • 1.R3b4+?
      • 1...Kd3
        • 2.Rd4#
        • 2.Qd5#
      • 1...axb4!
  • Keys
    • 1.Bxe3!
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Rxc3#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf4
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(h);P_SPINP(e),P_SPINS(j),S_FLIGHT::QAR2(B)
    • S(g);N_GUARD::QAR2(B)
    • S(g);N_GUARD::QAR2(B),XS(g)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAB1(B)
      • Vars
        • K(h);P_SPINP(e),P_SPINS(j),S_FLIGHT::QAR2(B)
        • K(h);P-FLIGHT::QAR1(B)
        • S(g);N_GUARD::QAR2(B),XS(g)
      • Refutation
        • S(j);
    • Try
      • B(E);
      • Threat
        • QAB1(B)
      • Vars
        • K(h);P_SPINP(e),P_SPINS(j),S_FLIGHT::QAR2(B)
        • K(h);P-FLIGHT::QAR1(B)
        • S(g);N_GUARD::QAR2(B),XS(g)
      • Refutation
        • S(j);
    • Try
      • R(C);CHECK
      • Refutation
        • P(i);XR(C)
  • Actual
    • B(E);XP(f)
    • Threat
      • QAB1(B)
    • Vars
      • K(h);P_SPINP(e),P_SPINS(j),S_FLIGHT::R1(C),XP(e)
      • S(g);N_GUARD::QAR2(B),XS(g)
      • S(j);::QAR2(B)
HTML5 logo

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).