MESON Chess Problem Database

Problem Display
PID: 218440 (5nr1/1B4B1/3R1N2/2Np2Q1/2qk2K1/P1Rp4/2p5/2r3b1 w - - 0 1)

Priester, August

Philadelphia Times, 1881

5nr1/1B4B1/3R1N2/2Np2Q1/2qk2K1/P1Rp4/2p5/2r3b1

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc3+
      • 2.Sfe4#
    • 1...Qa2
      • 2.Sxg8#
    • 1...Qb3
      • 2.Sxg8#
    • 1...Qb5
      • 2.Sxg8#
    • 1...Qa6
      • 2.Sxg8#
    • 1...Qa4
      • 2.Sxg8#
    • 1...Qb4
      • 2.Sxg8#
    • 1...Rh8
      • 2.Sfe4#
      • 2.Sfd7#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Rxc4#
      • 1...Kxc3+
        • 2.Sfe4#
      • 1...Qxd5
        • 2.Sxg8#
      • 1...Qxc3
        • 2.Ba2#
        • 2.Bb3#
        • 2.Be6#
        • 2.Bf7#
        • 2.Bxg8#
      • 1...Qxc5
        • 2.Sxg8#
      • 1...Qa2
        • 2.Sxg8#
      • 1...Qb3
        • 2.Sxg8#
      • 1...Qb5
        • 2.Sxg8#
      • 1...Qa6
        • 2.Sxg8#
      • 1...Qa4
        • 2.Sxg8#
      • 1...Qb4
        • 2.Sxg8#
      • 1...Kxc5+!
    • 1.Rxd5+?
      • 1...Kxc3+
        • 2.Sfe4#
      • 1...Qxd5!
    • 1.Qf4+?
      • 1...Kxc3
        • 2.Sfe4#
        • 2.Sxd5#
      • 1...Kxc5!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Rxc4#
      • 1...Kxc3+
        • 2.Sfe4#
      • 1...Kxc5+
        • 2.Se4#
      • 1...Qxa6
        • 2.Sxg8#
      • 1...Qxc3
        • 2.Rxd5#
      • 1...Qxc5
        • 2.Rxd3#
      • 1...Qa2
        • 2.Sxg8#
      • 1...Qb3
        • 2.Sxg8#
      • 1...Qb5
        • 2.Sxg8#
      • 1...Qa4
        • 2.Sxg8#
      • 1...Qb4
        • 2.Sxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(f);CHECK,N_SPINP(g),S_FLIGHT,XR(B)::B(I)+S(G),DCHECK
    • Q(e);::B(I)+S(G),XR(i)
  • Tries
    • Try
      • B(H);XP(g)
      • Threat
        • R1(B),XQ(e)
      • Vars
        • K(f);CHECK,S_FLIGHT,XR(B)::B(I)+S(G),DCHECK
        • Q(e);P_SPINQ(e),XB(H)::B(I)+S(G),XR(i)
        • Q(e);XS(D)::B(I)+S(G),XR(i)
        • Q(e);::B(I)+S(G),XR(i)
      • Refutation
        • K(f);CHECK,P_SPINQ(e),S_FLIGHT,XS(D)
    • Try
      • R(F);CHECK,XP(g)
      • Vars
        • K(f);CHECK,S_FLIGHT,XR(B)::B(I)+S(G),DCHECK
      • Refutation
        • Q(e);XR(F)
    • Try
      • Q(E);CHECK,P_SPINB(I)
      • Refutation
        • K(f);N_SPINP(g),P_PINQ(E),P_SPINQ(e),S_FLIGHT,XS(D)
  • Actual
    • B(H);
    • Threat
      • R1(B),XQ(e)
    • Vars
      • K(f);CHECK,N_SPINP(g),S_FLIGHT,XR(B)::B(I)+S(G),DCHECK
      • K(f);CHECK,P_SPINQ(e),S_FLIGHT,XS(D)::S(G)
      • Q(e);XB(H)::B(I)+S(G),XR(i)
      • Q(e);N_GUARD,SBLOCK,XR(B)::R1(F),XP(g)
      • Q(e);N_GUARD,SBLOCK,XS(D)::R1(B),XP(d)
      • Q(e);::B(I)+S(G),XR(i)
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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).