MESON Chess Problem Database

Problem Display
PID: 176 (1r1N4/p1rPQ3/Pb6/p1Pp1P2/3kN1nn/1R4p1/8/1K2BB2 w - - 0 1)

Hannelius, Jan Ingvar

2nd Prize=, Die Schwalbe, 1950/II

1r1N4/p1rPQ3/Pb6/p1Pp1P2/3kN1nn/1R4p1/8/1K2BB2

#2

11 + 10

45 Schach 1952
3174 The Two-move Chess Problem Tradition and Development 1966
6479 Problemschach (Sidler) 1968
117 Suomen Shakki 1985
56 The Problemist 2005
56 The Problemist 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rcb7
      • 2.Sc6#
    • 1...Rxd7
      • 2.Sc6#
    • 1...Se3
      • 2.Bc3#
    • 1...dxe4
      • 2.Qd6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Rd3#
      • 1...Sf2
        • 2.Qe3#
      • 1...Se5
        • 2.Se6#
      • 1...Bxc5!
    • 1.Sf2?
      • threat
        • 2.Bc3#
      • 1...Se5
        • 2.Se6#
      • 1...Rxc5!
    • 1.Sxg3?
      • threat
        • 2.Bc3#
      • 1...Se5
        • 2.Se6#
        • 2.Bf2#
      • 1...Rxc5!
    • 1.Sg5?
      • threat
        • 2.Bc3#
      • 1...Se5
        • 2.Sde6#
      • 1...Rxc5!
    • 1.Sf6?
      • threat
        • 2.Bc3#
      • 1...Se5
        • 2.Se6#
      • 1...Rxc5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb5#
      • 1...Kxc5
        • 2.Sb5#
      • 1...Rxc5
        • 2.Rd3#
      • 1...Bxc5
        • 2.Bc3#
      • 1...Se5
        • 2.Se6#

There are these versions: 54308

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(i);N_GUARD::S(K),XR(i)
    • R(i);N_GUARD::S(K)
    • R(i);N_GUARD,XP(I)::S(K)
    • S(c);SBLOCK::B(B)
    • P(f);OGATEB,SBLOCK,XS(E)::QAR2(J)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • S(c);N_GUARD::QAB1(J)
        • S(c);SBLOCK::S(K)
      • Refutation
        • B(g);P_PINR(D),XP(F)
    • Try
      • S(E);
      • Threat
        • B(B)
      • Vars
        • S(c);SBLOCK::S(K)
      • Refutation
        • R(i);XP(F)
    • Try
      • S(E);XP(a)
      • Threat
        • B(B)
      • Refutation
        • R(i);XP(F)
    • Try
      • S(E);
      • Threat
        • B(B)
      • Vars
        • S(c);SBLOCK::S(K)
      • Refutation
        • R(i);XP(F)
    • Try
      • S(E);
      • Threat
        • B(B)
      • Vars
        • S(c);SBLOCK::S(K)
      • Refutation
        • R(i);XP(F)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(b);S_FLIGHT,XP(F)::QAB(J)+S(E)
      • R(i);SBLOCK,XP(F)::R1(D)
      • B(g);P_PINR(D),SBLOCK,XP(F)::B(B)
      • S(c);SBLOCK::S(K)
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