MESON Chess Problem Database

Problem Display
PID: 239951 (8/1B1n4/r3pRN1/2bp2K1/1nP1kN1p/2Q1pp2/8/8 w - - 0 1)

Hermanson, Halvar

Sinfonie Scacchistiche, 1969

8/1B1n4/r3pRN1/2bp2K1/1nP1kN1p/2Q1pp2/8/8

#2

7 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd3#
    • 1...Sc2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sc6
      • 2.Qd3#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sb6
      • 2.Rxe6#
      • 2.Qe5#
    • 1...Sxf6
      • 2.Qe5#
    • 1...Sb8
      • 2.Qe5#
    • 1...Sf8
      • 2.Qe5#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Rf4#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...Bd6
        • 2.Qxe3#
      • 1...Be7
        • 2.Qxe3#
      • 1...Sd3
        • 2.Sb6#
      • 1...e5!
    • 1.Bxd5+?
      • 1...Sxd5
        • 2.Qd3#
      • 1...exd5!
    • 1.Rxe6+?
      • 1...Se5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Rxe6!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Rf4#
      • 1...Sxf6
        • 2.Sxc5#
      • 1...Bd6
        • 2.Qd4#
      • 1...Be7
        • 2.Qd4#
      • 1...Sd3
        • 2.Bxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
    • S(c);N_GUARD,N_SPINP(g)::QAB1(A)
    • S(j);N_GUARD::QAR1(A),XS(j)
    • S(j);N_GUARD,XR(E)::QAR1(A)
    • S(j);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(C);XP(g)
      • Threat
        • R1(E)
      • Vars
        • S(j);XR(E)::B(G)+S(C),DCHECK,XS(j)
        • B(f);N_GUARD::QAR1(A),XP(a)
        • B(f);N_GUARD,P_PINR(E)::QAR1(A),XP(a)
        • S(c);N_GUARD::B(G)+S(C)
      • Refutation
        • P(i);
    • Try
      • B(G);CHECK,XP(g)
      • Vars
        • S(c);XB(G)::QAB1(A)
      • Refutation
        • P(i);XB(G)
    • Try
      • R(E);CHECK,XP(i)
      • Refutation
        • R(h);XR(E)
  • Actual
    • S(C);XP(i)
    • Threat
      • R1(E)
    • Vars
      • S(j);N_GUARD,XR(E)::S(C),XB(f)
      • B(f);N_GUARD::QAR1(A)
      • B(f);N_GUARD,P_PINR(E)::QAR1(A)
      • S(c);N_GUARD::B(G),XP(g)
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