MESON Chess Problem Database

Problem Display
PID: 238161 (8/1B5K/6Q1/1pnPp3/Ppkq2p1/rp2RN2/2P5/B7 w - - 0 1)

Hermanson, Halvar

Deutsche Schachzeitung, 1979

8/1B5K/6Q1/1pnPp3/Ppkq2p1/rp2RN2/2P5/B7

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxe5#
    • 1...Qd2
      • 2.Sxd2#
      • 2.Sxe5#
    • 1...Qd3
      • 2.Sxe5#
    • 1...Qe4
      • 2.Sd2#
    • 1...Qf4
      • 2.Sd2#
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxb5#
      • 1...Qd3+
        • 2.cxd3#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Rxa4
        • 2.cxb3#
      • 1...bxa4
        • 2.Ba6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD::S(D),XP(i)
    • Q(e);N_GUARD,P_PINQ(G)::S(D),XP(i)
    • Q(e);N_GUARD,P_PINQ(G)::S(D)
    • Q(e);N_GUARD::S(D)
  • Actual
    • Q(G);P_PINS(h)
    • Threat
      • QAB1(G),XP(g)
    • Vars
      • Q(e);CHECK,OGATE::P(B),XQ(e)
      • Q(e);CHECK,OGATEB::R(C),XQ(e)
      • R(a);N_GUARD,XP(E)::P(B),XP(b)
      • P(g);OGATEB,XP(E)::B(H)
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