MESON Chess Problem Database

Problem Display
PID: 22206 (2b5/2n1bN2/2Bp4/3P2Q1/4k2K/2R1PN1p/1n3RPp/3q1r2 w - - 0 1)

Schmidt, Leif Carl

Die Schwalbe, 1974

2b5/2n1bN2/2Bp4/3P2Q1/4k2K/2R1PN1p/1n3RPp/3q1r2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Sd2#
    • 1...Qxf3
      • 2.gxf3#
    • 1...Qa4
      • 2.Sd2#
    • 1...Qa1
      • 2.Sd2#
    • 1...Qb1
      • 2.Sd2#
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qxd5
      • 2.Sd2#
    • 1...Bxg5+
      • 2.S3xg5#
    • 1...Bf6
      • 2.Sxd6#
    • 1...Bd8
      • 2.Sxd6#
    • 1...Bf8
      • 2.Qf4#
    • 1...Sd3
      • 2.Rc4#
  • Tries
    • 1.Kg3?
      • threat
        • 2.Qf4#
      • 1...Qxf3+
        • 2.gxf3#
      • 1...Bxg5
        • 2.S3xg5#
        • 2.Sxd6#
      • 1...Sd3
        • 2.Rc4#
      • 1...Se6
        • 2.Qg6#
      • 1...h1S+!
    • 1.Qxe7+?
      • 1...Be6
        • 2.S3g5#
        • 2.Sxd6#
      • 1...Se6
        • 2.S3g5#
        • 2.Sxd6#
      • 1...Kf5!
  • Keys
    • 1.Kh5!
      • threat
        • 2.Qf4#
      • 1...Qxf3+
        • 2.gxf3#
      • 1...Bg4+
        • 2.Qxg4#
      • 1...Qxd5
        • 2.Sd2#
      • 1...Bxg5
        • 2.Sxd6#
      • 1...Sd3
        • 2.Rc4#
      • 1...Se6
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::S(E)
    • Q(a);OGATE,XS(E)::P(B),XQ(a)
    • Q(a);N_GUARD::S(E),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(E)
    • B(i);CHECK,XQ(H)::S(E),XB(i)
    • B(i);N_GUARD::S(J),XP(g)
    • B(i);N_PINQ(H)::QAR1(H)
    • S(c);N_GUARD,SBLOCK,S_CUTQ(a)::R(C)
  • Tries
    • Try
      • K(F);N_SPINQ(H),S_FLIGHT
      • Threat
        • QAR1(H)
      • Vars
        • Q(a);CHECK,OGATE,XS(E)::P(B),XQ(a)
        • S(c);N_GUARD,SBLOCK,S_CUTQ(a)::R(C)
        • S(h);S_CUTB(j)::QAB(H)
      • Refutation
        • P(d);CHECK
    • Try
      • Q(H);CHECK,N_SPINQ(H),XB(i)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • K(F);N_SPINQ(H),P-FLIGHT,P_SPINS(E)
    • Threat
      • QAR1(H)
    • Vars
      • Q(a);CHECK,OGATE,XS(E)::P(B),XQ(a)
      • B(j);CHECK,N_GUARD,N_PINS(E)::QAR2(H),XB(j)
      • Q(a);N_PINS(E),P_PINQ(H),P_SPINQ(a),XP(G)::S(E)
      • B(i);N_GUARD,XQ(H)::S(J),XP(g)
      • S(c);N_GUARD,SBLOCK,S_CUTQ(a)::R(C)
      • S(h);S_CUTB(j)::QAB(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).