MESON Chess Problem Database

Problem Display
PID: 143524 (b7/2p5/2BP1P2/1N1NpR2/2P1k1P1/1Kpr1pp1/2Q2p2/3Rn3 w - - 0 1)

Rupp, Robert

American Chess Problemist, 1949

b7/2p5/2BP1P2/1N1NpR2/2P1k1P1/1Kpr1pp1/2Q2p2/3Rn3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qxd3#
  • Tries
    • 1.Rxf3?
      • threat
        • 2.Sdxc3#
        • 2.Re3#
      • 1...Bxc6
        • 2.Re3#
      • 1...Sxc2
        • 2.Sdxc3#
      • 1...Sxf3
        • 2.Qxd3#
      • 1...f1S
        • 2.Sdxc3#
      • 1...Sg2
        • 2.Sdxc3#
        • 2.Qxd3#
      • 1...Kxf3!
    • 1.Qe2+?
      • 1...Re3
        • 2.Sbxc3#
        • 2.Sdxc3#
        • 2.Qxe3#
      • 1...fxe2!
  • Keys
    • 1.Qxc3!
      • threat
        • 2.Rxe5#
      • 1...Rxc3+
        • 2.Sbxc3#
      • 1...Rxd5
        • 2.Qxe5#
      • 1...cxd6
        • 2.Sxd6#
      • 1...Rd4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(B),XR(d)
  • Tries
    • Try
      • R(H);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(j);XB(I)::R1(H)
        • S(a);N_SPINR(d),XQ(B)::B(I)+S(G),DCHECK,XP(c)
        • S(a);N_GUARD,XR(H)::QAB1(B),XR(d)
        • P(b);::B(I)+S(G),DCHECK,XP(c)
      • Refutation
        • K(g);N_SPINR(d),S_FLIGHT,XR(H)
    • Try
      • Q(B);CHECK,N_PINR(d)
      • Refutation
        • P(e);XQ(B)
  • Actual
    • Q(B);N_PINR(d),P_SPINQ(B),XP(c)
    • Threat
      • R1(H),XP(h)
    • Vars
      • R(d);CHECK,XQ(B)::S(F),XR(d)
      • R(d);N_PINQ(B),P_SPINR(d),XS(G)::QAR1(B),XP(h)
      • P(i);XP(J)::S(F),XP(i)
      • R(d);N_PINQ(B)::QAR1(B)
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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).