MESON Chess Problem Database

Problem Display
PID: 143105 (8/2pQ2p1/2P2p2/4p1P1/rRN1pk1B/p3p2P/4b3/2K4B w - - 0 1)

Hannelius, Jan Ingvar

4th Prize, The Problemist, 1987/II

8/2pQ2p1/2P2p2/4p1P1/rRN1pk1B/p3p2P/4b3/2K4B

#2

9 + 10

422 Suomen Tehtavaniekat 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qg4#
    • 1...Bd3
      • 2.Qg4#
    • 1...Bxc4
      • 2.Qg4#
    • 1...Bg4
      • 2.Qxg4#
    • 1...fxg5
      • 2.Qf7#
  • Tries
    • 1.Sxe3?
      • threat
        • 2.Sd5#
      • 1...Kxe3
        • 2.Qd2#
      • 1...Ra5
        • 2.Rxe4#
      • 1...Bc4!
    • 1.Sb6?
      • threat
        • 2.Sd5#
      • 1...Ra5
        • 2.Rxe4#
      • 1...Bc4
        • 2.Qg4#
      • 1...cxb6!
    • 1.Bxe4?
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Sd2#
      • 1...Bg4
        • 2.Qxg4#
      • 1...f5
        • 2.Qxf5#
      • 1...g6!
    • 1.Qxg7?
      • threat
        • 2.Qxf6#
      • 1...Kf5
        • 2.Qxf6#
      • 1...fxg5
        • 2.Qxe5#
        • 2.Qf6#
        • 2.Qf8#
        • 2.Qxg5#
        • 2.Qf7#
      • 1...f5
        • 2.Qxe5#
      • 1...Bg4!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sg6#
      • 1...Kxe5
        • 2.Bg3#
      • 1...fxe5
        • 2.Qf7#
      • 1...Bh5
        • 2.Sd3#
      • 1...g6
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • B(a);N_GUARD::QAR1(I)
    • B(a);N_GUARD,XS(E)::QAR1(I)
    • B(a);N_GUARD::QAR1(I),XB(a)
    • P(h);OGATEB,XP(G)::QAR(I)
  • Tries
    • Try
      • S(E);P_PINP(e),XP(c)
      • Threat
        • S(E)
      • Vars
        • K(f);N_SPINP(e),OGATEB,S_FLIGHT,XS(E)::QAB1(I)
        • R(d);N_GUARD::R1(D),XP(e)
      • Refutation
        • B(a);N_SPINP(e)
    • Try
      • S(E);P_PINP(e)
      • Threat
        • S(E)
      • Vars
        • R(d);N_GUARD::R1(D),XP(e)
        • B(a);N_GUARD,N_SPINP(e)::QAR1(I)
      • Refutation
        • P(i);XS(E)
    • Try
      • B(B);XP(e)
      • Threat
        • QAR1(I)
      • Vars
        • K(f);P-FLIGHT,XB(B)::R(D)+S(E),DCHECK
        • B(a);N_GUARD::QAR1(I),XB(a)
        • P(h);::QAR1(I),XP(h)
      • Refutation
        • P(j);
    • Try
      • Q(I);XP(j)
      • Threat
        • QAR2(I),XP(h)
      • Vars
        • K(f);P-FLIGHT::QAR1(I),XP(h)
        • P(h);OGATE::QAB1(I),XP(g)
      • Refutation
        • B(a);
  • Actual
    • S(E);P_PINP(e),XP(g)
    • Threat
      • S(E)
    • Vars
      • K(f);N_SPINP(e),S_FLIGHT,XS(E)::B(F)
      • P(h);OGATEB,SBLOCK,XS(E)::QAR(I)
      • B(a);N_GUARD::S(E)
      • P(j);::S(E),XP(j)
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