MESON Chess Problem Database

Problem Display
PID: 134875 (1R2Q3/7b/1p1b4/1p6/RN1k1P2/K3N2r/B1Pp4/2r3B1 w - - 0 1)

Kolodnas, Zelikas

Die Schwalbe, 1930

1R2Q3/7b/1p1b4/1p6/RN1k1P2/K3N2r/B1Pp4/2r3B1

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sd5#
    • 1...Kc5
      • 2.Sa6#
    • 1...Rxe3+
      • 2.Qxe3#
    • 1...Rh4
      • 2.Sd1#
    • 1...Rh5
      • 2.Sd1#
    • 1...Rh6
      • 2.Sd1#
    • 1...Bc5
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf8
      • 2.Qe5#
  • Tries
    • 1.Qh8+?
      • 1...Kc5
        • 2.Qc3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Ke4!
    • 1.c3+?
      • 1...Kxc3
        • 2.Sd5#
      • 1...Kc5
        • 2.Sa6#
        • 2.Qc6#
      • 1...Rxc3+!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Qe5#
      • 1...Rxe3+
        • 2.Qxe3#
      • 1...Kc3
        • 2.Sd5#
      • 1...Kc5
        • 2.Sa6#
      • 1...Rh5
        • 2.Sd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(d);N_PINS(E),P_PINS(G),S_FLIGHT::S(E)
    • K(d);S_FLIGHT::S(G)
    • R(c);CHECK,OGATE,P_PINS(G),P_SPINR(c),XS(E)::QAB1(J),XR(c)
    • R(c);N_PINS(E),P_PINS(G)::B(A)+S(E)
    • B(g);N_GUARD::QAB1(J)
    • B(g);N_GUARD::QAB1(J),XB(g)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR2(J)
        • B(g);N_GUARD,P_SPINB(g)::QAB1(J),XB(g)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • P(C);CHECK,N_SPINS(E),P_SPINS(G)
      • Vars
        • K(d);S_FLIGHT,XP(C)::S(E)
      • Refutation
        • R(a);CHECK,XP(C)
  • Actual
    • R(I);P_PINB(g)
    • Threat
      • QAB1(J)
    • Vars
      • R(c);CHECK,OGATE,P_PINS(G),P_SPINR(c),XS(E)::QAB1(J),XR(c)
      • K(d);N_PINS(E),N_SPINB(g),P_PINS(G),S_FLIGHT::S(E)
      • K(d);N_SPINB(g),S_FLIGHT::S(G)
      • R(c);N_PINS(E),P_PINS(G)::B(A)+S(E)
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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).