MESON Chess Problem Database

Problem Display
PID: 17461 (8/qr3p2/2QPrR2/1p1KPNp1/3P3P/R2N1k1B/4p3/4B3 w - - 0 1)

Hermanson, Halvar

3rd Prize, Tidskrift for Schack, 1946

8/qr3p2/2QPrR2/1p1KPNp1/3P3P/R2N1k1B/4p3/4B3

#2

12 + 8

3105 FIDE Album (1945-1955) 1964
273 Mat Plus 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4+
      • 2.Kxd4#
    • 1...Qc5+
      • 2.Kxc5#
    • 1...Qb8
      • 2.Kc5#
    • 1...Qa4
      • 2.Kc5#
    • 1...Qa5
      • 2.Kc5#
    • 1...Qa8
      • 2.Kc5#
    • 1...Rxe5+
      • 2.Kxe5#
    • 1...Rxd6+
      • 2.Kxd6#
    • 1...b4
      • 2.Kc4#
  • Tries
    • 1.Sc1+?
      • 1...Kf4
        • 2.Sxe2#
        • 2.Bd2#
        • 2.Bg3#
      • 1...Qxa3!
    • 1.Sb2+?
      • 1...Kf4
        • 2.Bd2#
        • 2.Bg3#
        • 2.Qc1#
      • 1...Qxa3!
    • 1.Sf2+?
      • 1...Kf4
        • 2.Bd2#
        • 2.Qc1#
      • 1...Qxa3!
    • 1.Sb4+?
      • 1...Kf4
        • 2.Bd2#
        • 2.Bg3#
        • 2.Qc1#
      • 1...Qxa3!
    • 1.Sf4+?
      • 1...Kxf4
        • 2.Bd2#
        • 2.Bg3#
        • 2.Qc1#
      • 1...Qxa3!
    • 1.Sc5+?
      • 1...Kf4
        • 2.Bd2#
        • 2.Bg3#
      • 1...Qxa3!
    • 1.Se3+?
      • 1...Kxe3
        • 2.Qc1#
      • 1...Rxf6!
    • 1.Sg3+?
      • 1...Ke3
        • 2.Qc1#
      • 1...Rxf6!
    • 1.Sh6+?
      • 1...Ke3
        • 2.Sg4#
        • 2.Qc1#
      • 1...Rxf6!
    • 1.Se7+?
      • 1...Ke3
        • 2.Qc1#
      • 1...Rxf6!
    • 1.Sg7+?
      • 1...Ke3
        • 2.Qc1#
      • 1...Rxf6!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qe3#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Rxe5+
        • 2.Sxe5#
      • 1...Rxd6+
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(f);CHECK,XP(E)::QAB(J)+K(G),XQ(f)
    • Q(f);CHECK::QAB(J)+K(G),XQ(f)
    • Q(f);::QAB(J)+K(G)
    • R(e);CHECK,XP(H)::QAB(J)+K(G),XR(e)
    • R(e);CHECK,XP(K)::QAB(J)+K(G),XR(e)
    • P(c);::QAB(J)+K(G)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • Q(f);XR(B)
    • Try
      • S(C);CHECK
      • Refutation
        • Q(f);XR(B)
    • Try
      • S(C);CHECK
      • Refutation
        • Q(f);XR(B)
    • Try
      • S(C);CHECK
      • Refutation
        • Q(f);XR(B)
    • Try
      • S(C);CHECK
      • Refutation
        • Q(f);XR(B)
    • Try
      • S(C);CHECK
      • Refutation
        • Q(f);XR(B)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(I)::QAB(J)
      • Refutation
        • R(e);XR(L)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(J)
      • Refutation
        • R(e);XR(L)
    • Try
      • S(I);CHECK
      • Refutation
        • R(e);XR(L)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(J)
      • Refutation
        • R(e);XR(L)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB(J)
      • Refutation
        • R(e);XR(L)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • Q(f);CHECK,XP(E)::R(L)+S(I),DCHECK,XQ(f)
      • Q(f);CHECK,N_GUARD::R(B)+S(C),XQ(f)
      • R(e);CHECK,XP(H)::R(B)+S(C),DCHECK,XR(e)
      • R(e);CHECK,XP(K)::R(L)+S(I),XR(e)
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