MESON Chess Problem Database

Problem Display
PID: 96437 (8/K7/1p3pB1/p4Rr1/r1p1k3/b1Pn1p2/2n5/1Q1R1N2 w - - 0 1)

Hermanson, Halvar

Problem (Zagreb), 1953

8/K7/1p3pB1/p4Rr1/r1p1k3/b1Pn1p2/2n5/1Q1R1N2

#2

7 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Re1#
    • 1...Sce1
      • 2.Rxe1#
    • 1...Se3
      • 2.Sd2#
    • 1...Scb4
      • 2.Re1#
    • 1...Sc1
      • 2.Rd4#
    • 1...Sde1
      • 2.Rd4#
    • 1...Sb2
      • 2.Rd4#
    • 1...Sf2
      • 2.Rd4#
    • 1...Sdb4
      • 2.Rd4#
    • 1...Sf4
      • 2.Rd4#
    • 1...Sc5
      • 2.Rd4#
    • 1...Se5
      • 2.Rd4#
  • Tries
    • 1.Re5+?
      • 1...Kf4
        • 2.Re4#
      • 1...Kxe5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qc6#
        • 2.Qd5#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Rxg6
        • 2.Qd5#
      • 1...Bc5
        • 2.Qc6#
      • 1...Se3
        • 2.Sd2#
      • 1...Scb4
        • 2.Qxc4#
      • 1...Sd4
        • 2.Qd5#
      • 1...Sdb4
        • 2.Qe8#
      • 1...Sf4
        • 2.Re5#
      • 1...Sc5
        • 2.Qc6#
      • 1...Se5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD,P_SPINS(c)::R(B)
    • S(a);N_GUARD,P_SPINS(c)::R(B),XS(a)
    • S(a);P_SPINS(c),SBLOCK::S(C)
    • S(c);OGATE,P_SPINS(a)::R1(B)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(g);P-FLIGHT::R1(E)
      • Refutation
        • K(g);P-FLIGHT,XR(E)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(i);OGATE,P_SPINR(i),XR(E)::QAB1(A),XR(i)
      • R(i);XB(F)::QAB1(A)
      • B(b);::QAB(A)
      • S(a);SBLOCK::S(C)
      • S(a);N_GUARD,S_CUTR(e)::QAR2(A),XP(f)
      • S(a);::QAB1(A)
      • S(c);N_GUARD,S_CUTB(b)::QAR(A)
      • S(c);SBLOCK::B(F)+R(E),DCHECK
      • S(c);::QAB(A)
      • S(c);::QAB1(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).