MESON Chess Problem Database

Problem Display
PID: 71221 (b7/1n6/1Q6/1Np1K3/2k5/1pP1BN2/1p2PP2/1n6 w - - 0 1)

Hermanson, Halvar

Il Due Mosse, 1955

b7/1n6/1Q6/1Np1K3/2k5/1pP1BN2/1p2PP2/1n6

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sa3
      • 2.Sd2#
    • 1...Sxc3
      • 2.Sa3#
    • 1...Sa5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qxc5#
    • 1...Sd8
      • 2.Qxc5#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Se5#
      • 1...Sxc3
        • 2.Sa3#
      • 1...Sd8+!
    • 1.Sd6+?
      • 1...Sxd6
        • 2.Qxc5#
      • 1...Kxc3!
    • 1.Bd4?
      • 1...Sxc3
        • 2.Sa3#
      • 1...Sd2
        • 2.Sxd2#
        • 2.Sa3#
      • 1...Sa3
        • 2.Sd2#
        • 2.Sxa3#
      • 1...Sa5
        • 2.Sd6#
        • 2.Qxc5#
      • 1...Sd6
        • 2.Sxd6#
        • 2.Qxc5#
      • 1...Sd8
        • 2.Sd6#
        • 2.Qxc5#
      • 1...cxd4!
    • 1.Qa5?
      • threat
        • 2.Qa4#
      • 1...Sxc3
        • 2.Sd2#
        • 2.Sa3#
      • 1...Sxa5!
    • 1.Qc6?
      • 1...Sd2
        • 2.Sxd2#
      • 1...Sa3
        • 2.Sd2#
      • 1...Sa5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qxc5#
      • 1...Sd8
        • 2.Qxc5#
      • 1...Sxc3!
    • 1.Qxb7?
      • 1...Sxc3
        • 2.Sa3#
        • 2.Sd6#
      • 1...Sd2
        • 2.Sxd2#
      • 1...Sa3
        • 2.Sd2#
      • 1...Bxb7!
  • Keys
    • 1.Bd2!
      • 1...Sxd2
        • 2.Sxd2#
      • 1...Sxc3
        • 2.Sa3#
      • 1...Sa3
        • 2.Sxa3#
      • 1...Sa5
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sd8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(E),XS(a)
    • S(a);N_GUARD::S(E)
    • S(a);N_GUARD,SBLOCK,XP(C)::S(F)
    • S(f);N_GUARD::QAR1(H),XP(e)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Threat
        • S(E)
      • Vars
        • S(a);N_GUARD,SBLOCK,XP(C)::S(F)
      • Refutation
        • S(f);CHECK
    • Try
      • S(F);CHECK
      • Vars
        • S(f);XS(F)::QAR1(H),XP(e)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • B(D);
      • Vars
        • S(a);N_GUARD,XP(C)::S(F)
      • Refutation
        • P(e);XB(D)
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Refutation
        • S(f);XQ(H)
    • Try
      • Q(H);P_PINP(e)
      • Vars
        • S(a);N_GUARD::S(E),XS(a)
        • S(a);N_GUARD::S(E)
        • S(f);N_GUARD::QAR1(H),XP(e)
      • Refutation
        • S(a);XP(C)
    • Try
      • Q(H);XS(f)
      • Vars
        • S(a);N_GUARD::S(E),XS(a)
        • S(a);N_GUARD::S(E)
      • Refutation
        • B(g);XQ(H)
  • Actual
    • B(D);
    • Vars
      • S(a);XB(D)::S(E),XS(a)
      • S(a);N_GUARD,XP(C)::S(F)
      • S(a);N_GUARD::S(F),XS(a)
      • S(f);N_GUARD::S(F)
      • S(f);N_GUARD::S(F),XS(f)
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