MESON Chess Problem Database

Problem Display
PID: 247258 (kn6/2P5/p1P1p3/K3P3/4QP2/5P2/6p1/6B1 w - - 0 1)

Sommer, Bruno Oswald

Die Schwalbe, 1929

kn6/2P5/p1P1p3/K3P3/4QP2/5P2/6p1/6B1

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc6+
      • 2.Qxc6#
    • 1...Sd7
      • 2.cxd7#
  • Tries
    • 1.Ka4?
      • 1...Sxc6
        • 2.Qxc6#
        • 2.c8Q#
      • 1...Sd7
        • 2.cxd7#
      • 1...a5!
    • 1.Kb4?
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Sd7
        • 2.cxd7#
      • 1...a5+!
    • 1.Kb6?
      • 1...Sd7+
        • 2.cxd7#
      • 1...Sxc6
        • 2.Qxc6#
        • 2.c8Q#
        • 2.c8R#
      • 1...a5!
    • 1.Qb1?
      • threat
        • 2.Qb7#
        • 2.Qxb8#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Sd7
        • 2.Qb7#
      • 1...Sxc6+!
    • 1.Qc2?
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Sd7!
    • 1.Qd3?
      • 1...Sd7
        • 2.Qxa6#
      • 1...Sxc6+!
    • 1.Qe2?
      • 1...Sd7
        • 2.Qxa6#
      • 1...Sxc6+!
    • 1.Qa4?
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Sd7!
    • 1.Qb4?
      • threat
        • 2.Qb7#
        • 2.Qxb8#
        • 2.cxb8Q#
        • 2.cxb8R#
      • 1...Sd7
        • 2.Qb7#
      • 1...Sxc6+!
    • 1.f5?
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Sd7
        • 2.cxd7#
      • 1...exf5!
    • 1.c8S?
      • 1...Sd7
        • 2.c7#
      • 1...Sxc6+!
    • 1.c8B?
      • threat
        • 2.Bb7#
      • 1...Sd7
        • 2.c7#
      • 1...Sxc6+!
  • Keys
    • 1.Qc4!
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,OGATE,P_SPINS(e),XP(G)::QAB(C),XS(e)
    • S(e);OGATE::QAB(C)+P(G),XS(e)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • S(e);OGATE::QAB(C)+P(G),XS(e)
      • Refutation
        • P(b);
    • Try
      • K(E);S_FLIGHT
      • Vars
        • S(e);CHECK,OGATE,P_SPINS(e),XP(G)::QAB(C),XS(e)
        • S(e);OGATE::QAB(C)+P(G),XS(e)
      • Refutation
        • P(b);CHECK
    • Try
      • K(E);S_FLIGHT
      • Vars
        • S(e);CHECK,OGATE::QAB(C)+P(G),XS(e)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • S(e);::QAB1(C)
      • Refutation
        • S(e);CHECK,XP(G)
    • Try
      • Q(C);
      • Vars
        • S(e);CHECK,OGATE,XP(G)::QAB(C),XS(e)
      • Refutation
        • S(e);
    • Try
      • Q(C);
      • Vars
        • S(e);N_GUARD::QAR2(C),XP(b)
      • Refutation
        • S(e);CHECK,XP(G)
    • Try
      • Q(C);
      • Vars
        • S(e);N_GUARD::QAR2(C),XP(b)
      • Refutation
        • S(e);CHECK,XP(G)
    • Try
      • Q(C);
      • Vars
        • S(e);CHECK,OGATE,XP(G)::QAB(C),XS(e)
      • Refutation
        • S(e);
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Vars
        • S(e);::QAB1(C)
      • Refutation
        • S(e);CHECK,XP(G)
    • Try
      • P(D);
      • Vars
        • S(e);CHECK,OGATE,P_SPINS(e),XP(G)::QAB(C),XS(e)
        • S(e);OGATE::QAB(C)+P(G),XS(e)
      • Refutation
        • P(c);XP(D)
    • Try
      • P(H);
      • Vars
        • S(e);N_GUARD::QAB(C)+P(G)
      • Refutation
        • S(e);CHECK,P_SPINS(e),XP(G)
    • Try
      • P(H);
      • Threat
        • B(H)
      • Vars
        • S(e);N_GUARD::QAB(C)+P(G)
      • Refutation
        • S(e);CHECK,P_SPINS(e),XP(G)
  • Actual
    • Q(C);
    • Vars
      • S(e);CHECK,OGATE,XP(G)::QAB(C),XS(e)
      • S(e);N_GUARD::QAR2(C),XP(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).