MESON Chess Problem Database

Problem Display
PID: 140892 (3Rn3/1np3B1/b2b1qP1/p6R/1P1kN1K1/r2p2P1/1P3P2/2Q5 w - - 0 1)

Aarzen, Hans

Probleemblad, 1978

3Rn3/1np3B1/b2b1qP1/p6R/1P1kN1K1/r2p2P1/1P3P2/2Q5

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qe3#
    • 1...Bc4
      • 2.Qe3#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Rd5#
        • 2.Qf4#
      • 1...Sxd8
        • 2.Rd5#
      • 1...Rc3
        • 2.Qf4#
        • 2.Qxc3#
      • 1...d2
        • 2.Rd5#
      • 1...Bc4
        • 2.Qe3#
        • 2.Qf4#
      • 1...Sc5
        • 2.Rd5#
        • 2.Qxc5#
      • 1...c6
        • 2.Qf4#
      • 1...Sxf6+!
    • 1.Bxf6+?
      • 1...Kxe4
        • 2.Qe3#
        • 2.Qe1#
        • 2.Qh1#
        • 2.Qc6#
        • 2.f3#
      • 1...Sxf6+!
    • 1.Qc5+?
      • 1...Kxe4
        • 2.Qe3#
        • 2.Qd5#
      • 1...Sxc5!
    • 1.Qc6?
      • threat
        • 2.Qd5#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Bc4!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sxd6#
        • 2.Sxf6#
      • 1...Kc4
        • 2.Sd2#
      • 1...Qxg7
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sxd6#
        • 2.Sf6#
      • 1...Sxd8
        • 2.Sxd6#
      • 1...Sxg7
        • 2.Sxf6#
      • 1...Qe5
        • 2.Sc3#
      • 1...d2
        • 2.Sc5#
      • 1...Rc3
        • 2.Sd2#
        • 2.Sxc3#
        • 2.Sc5#
        • 2.Sxd6#
        • 2.Sxf6#
      • 1...Sc5
        • 2.Sxc5#
      • 1...c5
        • 2.Sd2#
        • 2.Sc3#
        • 2.Sxc5#
        • 2.Sxd6#
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • K(c);N_SPINB(f),N_SPINQ(g),P-FLIGHT,XS(F)::QAR1(A)
    • B(e);SBLOCK::QAB1(A)
  • Tries
    • Try
      • S(F);XQ(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_SPINB(f),XR(K)::R1(H)
        • P(b);::R1(H)
        • P(i);::QAR2(A)
      • Refutation
        • S(j);CHECK,P_SPINS(j),XS(F)
    • Try
      • B(J);CHECK,XQ(g)
      • Refutation
        • S(j);CHECK,XB(J)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(h);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(g);OGATE::B(J),XQ(g)
      • Refutation
        • B(e);
  • Actual
    • Q(A);
    • Threat
      • DUALS(5)
    • Vars
      • K(c);N_SPINB(f),N_SPINQ(g),P-FLIGHT::QAR(A)+S(F),DCHECK
      • S(h);N_SPINB(f),XR(K)::QAR(A)+S(F),XB(f)
      • S(j);N_SPINQ(g),XB(J)::QAR(A)+S(F),XQ(g)
      • Q(g);::QAR(A)+S(F)
      • P(b);::QAR(A)+S(F)
      • S(h);::QAR(A)+S(F),XS(h)
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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).