MESON Chess Problem Database

Problem Display
PID: 234010 (8/8/8/K2Rp3/1PQn1p2/4RP2/Np6/1Nnk4 w - - 0 1)

Hermanson, Halvar

Il Due Mosse, 1956

8/8/8/K2Rp3/1PQn1p2/4RP2/Np6/1Nnk4

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qxe2#
    • 1...Sb3+
      • 2.Qxb3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.Re4?
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxa2!
    • 1.Rxd4+?
      • 1...Sd3
        • 2.Rdxd3#
        • 2.Qb3#
        • 2.Qxd3#
      • 1...exd4!
    • 1.Qc3?
      • threat
        • 2.Re1#
        • 2.Qd2#
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Se2
        • 2.Rd3#
        • 2.Qd2#
      • 1...Sd3
        • 2.Qd2#
        • 2.Qxd3#
      • 1...fxe3!
    • 1.Qxd4+?
      • 1...Kc2
        • 2.Sa3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...exd4!
  • Keys
    • 1.Rexe5!
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Sxa2
        • 2.Rxd4#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(F),XS(a)
    • S(a);CHECK,N_GUARD::QAB(F),XS(a)
    • S(a);N_GUARD,N_SPINS(d)::QAR2(F),XS(a)
  • Tries
    • Try
      • R(C);
      • Vars
        • S(a);CHECK,N_GUARD::QAB(F),XS(a)
        • S(a);N_GUARD::QAB1(F),XS(a)
        • S(a);N_GUARD,N_SPINS(d)::QAR2(F),XS(a)
      • Refutation
        • S(a);XS(B)
    • Try
      • R(H);CHECK,XS(d)
      • Refutation
        • P(f);XR(H)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(F),XS(a)
      • Refutation
        • P(e);XR(C)
    • Try
      • Q(F);CHECK,XS(d)
      • Vars
        • K(b);S_FLIGHT::S(A)
        • S(a);N_GUARD,P_SPINS(a)::QAR2(F),XS(a)
      • Refutation
        • P(f);P_SPINP(f),XQ(F)
  • Actual
    • R(C);XP(f)
    • Vars
      • S(a);CHECK,N_GUARD::QAB(F),XS(a)
      • S(a);N_GUARD,XS(B)::R(H),XS(d)
      • S(a);N_GUARD::QAB1(F),XS(a)
      • S(a);N_GUARD,N_SPINS(d)::QAR2(F),XS(a)
HTML5 logo

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).