MESON Chess Problem Database

Problem Display
PID: 264240 (1N1KR3/b1nP1B2/3kp3/2r3N1/1P1pQR2/1b3p2/r6B/1q2n3 w - - 0 1)

Sindler, Ivan

Prace, 1950

1N1KR3/b1nP1B2/3kp3/2r3N1/1P1pQR2/1b3p2/r6B/1q2n3

#2

10 + 11

3713 Snap 2022
6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qc6#
    • 1...Sd5
      • 2.Rxe6#
      • 2.Qxe6#
    • 1...Sxe8
      • 2.dxe8S#
  • Tries
    • 1.Rf6+?
      • 1...Re5
        • 2.Bxe5#
        • 2.Qc6#
        • 2.Qxe5#
      • 1...Rxh2!
    • 1.Qc6+?
      • 1...Rxc6
        • 2.Rxd4#
      • 1...Ke5!
    • 1.Qxe6+?
      • 1...Bxe6
        • 2.Rxd4#
      • 1...Sxe6+!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Rxd4#
      • 1...Kd5
        • 2.Rf5#
      • 1...Ke5
        • 2.Rf5#
      • 1...Bxb8
        • 2.Qxc5#
      • 1...e5
        • 2.Se4#
      • 1...Rd5
        • 2.Qxc7#
      • 1...Re5
        • 2.Qc6#
      • 1...Bd5
        • 2.Rf6#
      • 1...Sd5
        • 2.Rxe6#
      • 1...d3
        • 2.Rd4#

Anticipated by 6581(1932-1933)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(g);N_GUARD,SBLOCK::QAR1(C)
    • S(k);OGATE,XR(J)::PXS(k)=S
  • Tries
    • Try
      • R(D);CHECK,P_PINP(i)
      • Refutation
        • R(c);XB(A)
    • Try
      • Q(C);CHECK
      • Vars
        • R(g);XQ(C)::B(A)+R(D),DCHECK,XP(f)
      • Refutation
        • K(h);P_SPINP(i),S_FLIGHT
    • Try
      • Q(C);CHECK,XP(i)
      • Vars
        • B(d);XQ(C)::B(A)+R(D),DCHECK,XP(f)
      • Refutation
        • S(k);CHECK,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • B(A)+R(D),DCHECK,XP(f)
    • Vars
      • K(h);P-FLIGHT,P_SPINP(i),S_CUTR(g)::R(D)
      • K(h);P_SPINP(i),S_FLIGHT::B(A)+R(D),DCHECK
      • B(j);N_GUARD,XS(H)::QAB1(C),XR(g)
      • P(i);::S(E)
      • R(g);OGATE,SBLOCK::QAB1(C),XS(k)
      • R(g);OGATE,SBLOCK::QAR1(C)
      • B(d);SBLOCK,S_CUTR(g)::B(A)+R(D)
      • S(k);N_GUARD,SBLOCK,S_CUTB(d)::R1(J),XP(i)
      • P(f);::B(A)+R(D),DCHECK
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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).