MESON Chess Problem Database

Problem Display
PID: 233486 (8/1N2K2p/2pN3p/3k2nr/3pRp2/3p4/4b1Q1/4r3 w - - 0 1)

Schreckenbach, Michael

Freie Presse, 1986

8/1N2K2p/2pN3p/3k2nr/3pRp2/3p4/4b1Q1/4r3

#2

5 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qa2#
    • 1...Bf3
      • 2.Qa2#
    • 1...Bg4
      • 2.Qa2#
    • 1...Sf3
      • 2.Qg8#
    • 1...Sh3
      • 2.Qg8#
    • 1...Sxe4
      • 2.Qxe4#
  • Tries
    • 1.Rxe2+?
      • 1...Sf3
        • 2.Qxf3#
        • 2.Qg8#
      • 1...Se4
        • 2.Qxe4#
      • 1...f3!
    • 1.Re3+?
      • 1...Bf3
        • 2.Qa2#
      • 1...Sf3
        • 2.Qg8#
      • 1...Se4
        • 2.Qxe4#
      • 1...f3!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Re5#
      • 1...Sxe4+
        • 2.Qxe4#
      • 1...Bf3
        • 2.Qa2#
      • 1...Sf3
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • B(b);OGATE,P_PINR(B)::QAB(A)
    • S(g);OGATE::QAB(A)
    • S(g);OGATE,P_SPINS(g),XR(B)::QAB1(A),XS(g)
  • Tries
    • Try
      • R(B);CHECK,P_SPINR(B),XB(b)
      • Vars
        • S(g);N_GUARD,N_PINR(B),P_SPINS(g)::QAB1(A),XS(g)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • R(B);CHECK
      • Vars
        • B(b);OGATE,P_PINR(B),P_SPINB(b)::QAB(A)
        • S(g);OGATE,P_SPINS(g)::QAB(A)
        • S(g);N_GUARD,P_SPINS(g)::QAB1(A),XS(g)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • QAB(A)+R(B),DCHECK
    • Vars
      • S(g);CHECK,OGATE,P_SPINS(g),XR(B)::QAB1(A),XS(g)
      • B(b);OGATE::QAB(A)
      • S(g);OGATE::QAB(A)
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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).