MESON Chess Problem Database

Problem Display
PID: 90575 (B2R3Q/B3Kp2/1P1N4/p3N3/Rq1k1P2/2p3P1/2Ppr3/8 w - - 0 1)

Barron, Philip

Die Schwalbe, 1949

B2R3Q/B3Kp2/1P1N4/p3N3/Rq1k1P2/2p3P1/2Ppr3/8

#2

12 + 7

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sg4#
    • 1...Rxe5+
      • 2.Qxe5#
  • Tries
    • 1.Be4?
      • threat
        • 2.b7#
      • 1...Ke3
        • 2.Sg4#
      • 1...Kc5
        • 2.Sd3#
        • 2.Sd7#
      • 1...Rxe4!
    • 1.Rxb4+?
      • 1...Ke3
        • 2.Sg4#
        • 2.b7#
      • 1...Kc5
        • 2.Rc4#
      • 1...axb4!
  • Keys
    • 1.Bc6!
      • threat
        • 2.b7#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Ke3
        • 2.Sg4#
      • 1...Kc5
        • 2.Sb7#

Anticipated by 102968(1931)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);N_PINS(E),N_SPINQ(d),P_PINS(G),S_FLIGHT::S(E)
    • R(b);CHECK,OGATE,P_PINS(G),P_SPINR(b),XS(E)::QAB1(L),XR(b)
  • Tries
    • Try
      • B(J);N_SPINS(E),P_SPINS(G)
      • Threat
        • B(H)+P(F)
      • Vars
        • K(e);N_SPINQ(d),S_FLIGHT::S(E)
      • Refutation
        • R(b);N_PINS(G),P_PINS(E),XB(J)
    • Try
      • R(C);CHECK,XQ(d)
      • Vars
        • K(e);S_FLIGHT::R1(C)
      • Refutation
        • P(f);XR(C)
  • Actual
    • B(J);
    • Threat
      • B(H)+P(F)
    • Vars
      • R(b);CHECK,OGATE,P_PINS(G),P_SPINR(b),XS(E)::QAB1(L),XR(b)
      • K(e);N_PINS(E),N_SPINQ(d),P_PINS(G),S_FLIGHT::S(E)
      • K(e);N_SPINQ(d),S_FLIGHT::S(G)
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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).