MESON Chess Problem Database

Problem Display
PID: 238102 (K3B2b/3RB3/p3k1P1/r1np3Q/3P4/4N3/2q2n2/5r1b w - - 0 1)

Hermanson, Halvar

Schweizerische Arbeiter Schachzeitung, 1957

K3B2b/3RB3/p3k1P1/r1np3Q/3P4/4N3/2q2n2/5r1b

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qf5#
    • 1...Qb3
      • 2.Qf5#
    • 1...Qa4
      • 2.Qf5#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qc1
      • 2.Qf5#
    • 1...Qa2
      • 2.Qf5#
    • 1...Qb2
      • 2.Qf5#
    • 1...Qd2
      • 2.Qf5#
    • 1...Qe2
      • 2.Qf5#
    • 1...Qc3
      • 2.Qf5#
    • 1...Qc4
      • 2.Qf5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Sfe4
      • 2.Qxd5#
    • 1...Sd3
      • 2.Qf5#
    • 1...Sce4
      • 2.Qf5#
  • Tries
    • 1.Qg4+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...Sxg4!
    • 1.Qg5?
      • threat
        • 2.Rd6#
      • 1...Sxd7
        • 2.Bf7#
      • 1...Sfe4
        • 2.Qxd5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Sce4
        • 2.Qf5#
      • 1...Sb7!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Rd6#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Sxd7
        • 2.Bf7#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sfe4
        • 2.Sc7#
      • 1...Sce4
        • 2.Sf4#
      • 1...Sb7
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(c);N_GUARD::QAB1(C)
    • Q(c);N_GUARD::QAB1(C),XQ(c)
    • B(j);N_GUARD::QAR1(C),XB(j)
    • S(d);S_CUTB(b)::QAB1(C),XP(g)
    • S(f);S_CUTQ(c)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(C),XQ(c)
      • Refutation
        • S(d);XQ(C)
    • Try
      • Q(C);
      • Threat
        • R1(E)
      • Vars
        • S(f);SBLOCK,XR(E)::B(H)
        • S(d);S_CUTB(b)::QAB1(C),XP(g)
        • B(j);N_GUARD::QAR1(C),XB(j)
        • S(f);S_CUTQ(c)::QAB1(C)
      • Refutation
        • S(f);
  • Actual
    • S(A);P_SPINS(A),XP(g)
    • Threat
      • R1(E)
    • Vars
      • B(b);CHECK,OGATE,XS(A)::QAB1(C),XB(b)
      • S(f);SBLOCK,XR(E)::B(H)
      • B(j);N_GUARD::QAR1(C),XB(j)
      • S(d);N_PINS(A)::S(A)
      • S(f);N_PINS(A)::S(A)
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