MESON Chess Problem Database

Problem Display
PID: 225837 (4R3/1pQrb3/2qr2bB/5PNp/3k4/4NBP1/2R1P3/4K3 w - - 0 1)

Vince, Michal

Praca, 1947

4R3/1pQrb3/2qr2bB/5PNp/3k4/4NBP1/2R1P3/4K3

#2

11 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bg7#
    • 1...Qxf3
      • 2.Qc3#
      • 2.Qc5#
    • 1...Qa4
      • 2.Qc3#
      • 2.Qc5#
    • 1...Qe4
      • 2.Qc3#
      • 2.Qc5#
    • 1...Qb5
      • 2.Qc3#
    • 1...Qd5
      • 2.Qc3#
    • 1...Qc3+
      • 2.Qxc3#
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qa6
      • 2.Qc3#
      • 2.Qc5#
    • 1...Qb6
      • 2.Qc3#
    • 1...Rd5
      • 2.Qf4#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Sf3#
      • 1...Kxe3
        • 2.Sf3#
      • 1...Ke5
        • 2.Bg7#
      • 1...Rxc6
        • 2.Qf4#
      • 1...Bxg5
        • 2.Rc4#
        • 2.Re4#
        • 2.Qb6#
      • 1...Rd5
        • 2.Qf4#
      • 1...bxc6!
    • 1.Rc4+?
      • 1...Kxe3
        • 2.Sh3#
        • 2.Sf7#
        • 2.Sh7#
      • 1...Ke5
        • 2.Bg7#
      • 1...Qxc4!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Sf3#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Kxe3
        • 2.Sf3#
      • 1...Ke5
        • 2.Bg7#
      • 1...Qxd5
        • 2.Qc3#
      • 1...Rxd5
        • 2.Qf4#
      • 1...Bxg5
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(a);P_SPINB(h),P_SPINR(d),S_FLIGHT::B(I)
    • Q(c);OGATE::QAB1(J)
    • Q(c);CHECK,OGATE::QAB1(J),XQ(c)
    • Q(c);OGATE::QAB1(J),XQ(c)
    • R(d);OGATE::QAR2(J)
  • Tries
    • Try
      • B(E);XQ(c)
      • Threat
        • S(H)
      • Vars
        • K(a);P_SPINB(h),S_FLIGHT,XS(D)::B(I)+S(H)
        • K(a);P_SPINB(h),P_SPINR(d),S_FLIGHT::B(I)
        • R(d);OGATE,XB(E)::QAR2(J)
        • R(d);OGATE::QAR2(J)
      • Refutation
        • P(f);XB(E)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P_SPINB(h),P_SPINR(d),S_FLIGHT::B(I)
      • Refutation
        • Q(c);XR(B)
  • Actual
    • B(E);
    • Threat
      • S(H)
    • Vars
      • Q(c);CHECK,OGATE::QAB1(J),XQ(c)
      • K(a);P_SPINB(h),S_FLIGHT,XS(D)::B(I)+S(H)
      • K(a);P_SPINB(h),P_SPINR(d),S_FLIGHT::B(I)
      • Q(c);OGATE,XB(E)::QAB1(J)
      • R(d);OGATE,XB(E)::QAR2(J)
      • B(h);OGATE,XS(H)::R1(K)
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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).