MESON Chess Problem Database

Problem Display
PID: 62975 (B7/1n3p2/1K1Qr3/1N3R2/RNbnkBP1/1p1p4/p4PP1/q1r3b1 w - - 0 1)

Coombes, TA

Chess, 1944

B7/1n3p2/1K1Qr3/1N3R2/RNbnkBP1/1p1p4/p4PP1/q1r3b1

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Rxd6+
      • 2.Sxd6#
  • Tries
    • 1.Bxb7+?
      • 1...Bd5
        • 2.Bxd5#
      • 1...Sc6!
    • 1.Re5+?
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Kxf4!
    • 1.Qxe6+?
      • 1...Bxe6
        • 2.Sd6#
      • 1...fxe6
        • 2.Sd6#
      • 1...Sxe6!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Sc5#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Bxb5
        • 2.f3#
      • 1...Re5
        • 2.Qxe5#
      • 1...Bd5
        • 2.f3#
      • 1...Sc6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(j);N_PINQ(J)::QAR1(J),XR(j)
    • R(j);CHECK,XQ(J)::S(G),XR(j)
  • Tries
    • Try
      • B(K);CHECK,XS(k)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::B(K),XB(g)
      • Refutation
        • S(h);N_PINQ(J),P_PINP(A),P_SPINS(h)
    • Try
      • R(H);CHECK
      • Vars
        • R(j);N_PINQ(J),XR(H)::QAR1(J),XR(j)
      • Refutation
        • K(i);N_SPINS(k),P-FLIGHT,XB(E)
    • Try
      • Q(J);CHECK,N_SPINQ(J),XR(j)
      • Vars
        • B(g);XQ(J)::S(G)
        • P(l);XQ(J)::S(G)
      • Refutation
        • S(h);P_PINP(A),XQ(J)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(j);CHECK,XQ(J)::S(G),XR(j)
      • B(g);N_SPINS(k),P_SPINS(h),XS(G)::P(A)
      • R(j);N_PINQ(J)::QAR1(J),XR(j)
      • B(g);N_SPINS(k),P_SPINS(h)::P(A)
      • S(h);N_PINQ(J),N_SPINS(k),P_PINP(A),P_SPINB(g)::QAB1(J)
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).