MESON Chess Problem Database

Problem Display
PID: 179001 (4RR2/8/B5p1/B1Qp2q1/8/8/2PPPNp1/1K2krn1 w - - 0 1)

Pedersen, Eigil Palle

Magasinet, 1943

4RR2/8/B5p1/B1Qp2q1/8/8/2PPPNp1/1K2krn1

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.dxe3#
    • 1...Qh4
      • 2.d4#
    • 1...Qe7
      • 2.d4#
    • 1...Qg3
      • 2.d3#
    • 1...Qg4
      • 2.d4#
    • 1...Qe5
      • 2.d4#
    • 1...Qf5
      • 2.d3#
    • 1...Qh5
      • 2.d3#
      • 2.d4#
    • 1...Sxe2
      • 2.Rxe2#
  • Keys
    • 1.Kc1!
      • threat
        • 2.Sd3#
      • 1...Qxd2+
        • 2.Bxd2#
      • 1...Sxe2+
        • 2.Rxe2#
      • 1...Rxf2
        • 2.Qxf2#
      • 1...Qe3
        • 2.dxe3#
      • 1...Qe7
        • 2.d4#
      • 1...Qg3
        • 2.d3#
      • 1...Qe5
        • 2.d4#
      • 1...Qf5
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE::B(F)+P(C),XQ(f)
    • Q(f);N_GUARD::B(F)+P(C)
    • Q(f);N_GUARD,P_PINP(B)::B(F)+P(C)
    • S(c);OGATE,P_SPINS(c),XP(D)::R1(I),XS(c)
  • Actual
    • K(A);P-FLIGHT,P_SPINP(C)
    • Threat
      • S(E)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XP(C)::B(F),XQ(f)
      • S(c);CHECK,OGATE,P_SPINS(c),XP(D)::R1(I),XS(c)
      • R(b);OGATE,XS(E)::QAB1(G),XR(b)
      • Q(f);::B(F)+P(C),XQ(f)
      • Q(f);N_PINP(C)::B(F)+P(C)
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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).