MESON Chess Problem Database

Problem Display
PID: 253150 (1Q2B3/p2R2p1/r1Rrk1b1/2b1Pp1p/2P2n2/p2N2B1/8/3K4 w - - 0 1)

Gross, Erwin

Die Schwalbe, 1965

1Q2B3/p2R2p1/r1Rrk1b1/2b1Pp1p/2P2n2/p2N2B1/8/3K4

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6
      • 2.Sxf4#
    • 1...Bg1
      • 2.Qxd6#
    • 1...Bf2
      • 2.Qxd6#
    • 1...Be3
      • 2.Qxd6#
    • 1...Bd4
      • 2.Qxd6#
    • 1...Bb6
      • 2.Rcxd6#
      • 2.Qxd6#
    • 1...Bxe8
      • 2.Qxe8#
    • 1...Sd5
      • 2.Sxc5#
  • Tries
    • 1.Bh4?
      • threat
        • 2.Re7#
      • 1...Rdxc6
        • 2.Sxf4#
      • 1...Sd5!
    • 1.Bf7+?
      • 1...Kxd7
        • 2.Rc7#
        • 2.Qc7#
        • 2.Qe8#
      • 1...Bxf7!
    • 1.Rdxd6+?
      • 1...Bxd6
        • 2.Qxd6#
      • 1...Ke7!
    • 1.Rb7?
      • threat
        • 2.Qc8#
      • 1...Rdxc6
        • 2.Sxf4#
      • 1...Bxe8
        • 2.Qxe8#
      • 1...Raxc6!
    • 1.Rdc7?
      • threat
        • 2.Qc8#
      • 1...Bxe8
        • 2.Qxe8#
      • 1...Raxc6!
    • 1.Qb7?
      • threat
        • 2.Re7#
      • 1...Sd5
        • 2.Sxc5#
      • 1...Rdxc6!
    • 1.Qc8?
      • threat
        • 2.Rxa7#
        • 2.Rb7#
        • 2.Rdc7#
        • 2.Rf7#
        • 2.Rxg7#
      • 1...Rdxc6
        • 2.Rc7#
      • 1...Bxe8
        • 2.Qxe8#
      • 1...Bf7
        • 2.Bxf7#
        • 2.Rxa7#
        • 2.Rb7#
        • 2.Rdc7#
        • 2.Rxf7#
      • 1...Raxc6!
    • 1.Qd8?
      • threat
        • 2.Re7#
        • 2.Qe7#
      • 1...Sd5
        • 2.Sxc5#
      • 1...Rdxc6!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Re7#
      • 1...Rdxc6
        • 2.Sxf4#
      • 1...Sd5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(g);N_PINS(B),N_SPINR(g),XR(F)::S(B),XS(b)
    • B(c);N_GUARD::QAR1(H),XR(g)
    • B(c);N_GUARD,N_PINS(B)::QAR1(H),XR(g)
    • B(i);OGATE,XB(I)::QAR2(H),XB(i)
    • S(b);N_PINS(B)::S(B),XB(c)
  • Tries
    • Try
      • B(C);
      • Threat
        • R1(G)
      • Vars
        • R(g);N_PINS(B),N_SPINR(g),XR(F)::S(B),XS(b)
      • Refutation
        • S(b);N_PINS(B)
    • Try
      • B(I);CHECK
      • Refutation
        • B(i);XB(I)
    • Try
      • R(G);CHECK,N_SPINS(B),XR(g)
      • Vars
        • B(c);OGATE,P_SPINB(c),XR(G)::QAR1(H),XB(c)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • R(G);
      • Threat
        • QAB(H)
      • Vars
        • R(g);N_PINS(B),N_SPINR(g),XR(F)::S(B),XS(b)
        • B(i);OGATE,XB(I)::QAR2(H),XB(i)
      • Refutation
        • R(f);N_SPINR(g),XR(F)
    • Try
      • R(G);
      • Threat
        • QAB(H)
      • Vars
        • B(i);OGATE,XB(I)::QAR2(H),XB(i)
      • Refutation
        • R(f);N_SPINR(g),XR(F)
    • Try
      • Q(H);
      • Threat
        • R1(G)
      • Vars
        • S(b);N_PINS(B)::S(B),XB(c)
      • Refutation
        • R(g);N_PINS(B),N_SPINR(g),XR(F)
    • Try
      • Q(H);
      • Threat
        • DUALS(5)
      • Vars
        • R(g);N_PINS(B),N_SPINR(g),XR(F)::QAB(H)+R(G)
        • B(i);OGATE,XB(I)::QAR2(H),XB(i)
      • Refutation
        • R(f);N_SPINR(g),XR(F)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_PINS(B)::S(B),XB(c)
      • Refutation
        • R(g);N_PINS(B),N_SPINR(g),XR(F)
  • Actual
    • Q(H);
    • Threat
      • R1(G)
    • Vars
      • R(g);N_PINS(B),N_SPINR(g),XR(F)::S(B),XS(b)
      • S(b);N_PINS(B)::S(B),XB(c)
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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).