MESON Chess Problem Database

Problem Display
PID: 54308 (5Q2/prrP4/Pb2RP2/p1Pp1n2/3kNp1n/1R6/4B3/1K2B3 w - - 0 1)

Hannelius, Jan Ingvar

2nd Prize=, Die Schwalbe, 1950/II

5Q2/prrP4/Pb2RP2/p1Pp1n2/3kNp1n/1R6/4B3/1K2B3

#2

11 + 10

56 The Problemist 2004
136 Problem Observer 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Bc3#
    • 1...Sg3
      • 2.Bf2#
    • 1...Sd6
      • 2.Bf2#
    • 1...Sh6
      • 2.Bf2#
    • 1...Se7
      • 2.Bf2#
    • 1...Sg7
      • 2.Bf2#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Rd3#
      • 1...Sd6
        • 2.Bf2#
      • 1...Se7
        • 2.Bf2#
      • 1...Bxc5!
    • 1.Sg3?
      • threat
        • 2.Bc3#
      • 1...Sd6
        • 2.Bf2#
      • 1...Se7
        • 2.Bf2#
      • 1...Rxc5!
    • 1.Sg5?
      • threat
        • 2.Bc3#
      • 1...Sd6
        • 2.Bf2#
      • 1...Se7
        • 2.Bf2#
      • 1...Rxc5!
    • 1.Rb4+?
      • 1...Ke3
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sg5#
        • 2.Sd6#
      • 1...axb4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb5#
      • 1...Kxc5
        • 2.Sxf5#
      • 1...Rxc5
        • 2.Rd3#
      • 1...Bxc5
        • 2.Bc3#
      • 1...Sxd6
        • 2.Bf2#
      • 1...Se7
        • 2.Bf2#

This is a version of 176

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(f);SBLOCK::B(B)
    • S(f);N_GUARD::B(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • S(f);N_GUARD::B(B)
      • Refutation
        • B(g);P_PINR(D),XP(F)
    • Try
      • S(E);
      • Threat
        • B(B)
      • Vars
        • S(f);N_GUARD::B(B)
      • Refutation
        • R(j);XP(F)
    • Try
      • S(E);
      • Threat
        • B(B)
      • Vars
        • S(f);N_GUARD::B(B)
      • Refutation
        • R(j);XP(F)
    • Try
      • R(D);CHECK
      • Refutation
        • P(d);XR(D)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(a);S_FLIGHT,XP(F)::QAB(K)+S(E),XS(f)
      • R(j);SBLOCK,XP(F)::R1(D)
      • B(g);P_PINR(D),SBLOCK,XP(F)::B(B)
      • S(f);N_GUARD,XS(E)::B(B)
      • S(f);N_GUARD::B(B)
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