MESON Chess Problem Database

Problem Display
PID: 24803 (8/1pb3Q1/N3r3/1np2R2/4k1P1/q7/2n2PPB/3R3K w - - 0 1)

Persson, Manne

1st Prize, Upsala AST, 1934

8/1pb3Q1/N3r3/1np2R2/4k1P1/q7/2n2PPB/3R3K

#2

9 + 8

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sxc5#
    • 1...Qb2
      • 2.Sxc5#
    • 1...Qa1
      • 2.Sxc5#
    • 1...Qa2
      • 2.Sxc5#
    • 1...Qb3
      • 2.Sxc5#
    • 1...Qd3
      • 2.Sxc5#
    • 1...Qf3
      • 2.Sxc5#
      • 2.gxf3#
    • 1...Qg3
      • 2.Sxc5#
    • 1...Qh3
      • 2.Sxc5#
    • 1...Qa4
      • 2.Sxc5#
    • 1...Qa5
      • 2.Sxc5#
    • 1...Re5
      • 2.Rf4#
    • 1...Rd6
      • 2.Rf4#
      • 2.Re5#
      • 2.Qe5#
    • 1...Bf4
      • 2.Rxf4#
    • 1...Ba5
      • 2.Rf4#
    • 1...Bb6
      • 2.Rf4#
    • 1...Bd6
      • 2.Qxb7#
    • 1...Bd8
      • 2.Rf4#
    • 1...Se3
      • 2.f3#
    • 1...Sb4
      • 2.Sxc5#
    • 1...Sd6
      • 2.Rf4#
  • Tries
    • 1.Qe5+?
      • 1...Rxe5
        • 2.Rf4#
      • 1...Bxe5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd5#
      • 1...Qa2
        • 2.Sxc5#
        • 2.Qd3#
      • 1...Qb3
        • 2.Sxc5#
      • 1...Qd3
        • 2.Sxc5#
        • 2.Qxd3#
      • 1...Re5
        • 2.Rf4#
      • 1...Rd6
        • 2.Re5#
      • 1...Bd6
        • 2.Qxb7#
      • 1...Se3
        • 2.f3#
      • 1...Sb4
        • 2.Sxc5#
      • 1...Sc3
        • 2.Qd3#
      • 1...Sd6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(b);N_GUARD,P_PINR(A)::S(H),XP(e)
    • Q(b);N_GUARD::S(H),XP(e)
    • Q(b);N_GUARD,P_PINB(E)::S(H),XP(e)
    • R(f);S_CUTB(h)::R1(G)
    • B(h);N_GUARD::R1(G),XB(h)
    • B(h);N_GUARD::R1(G)
    • B(h);OGATE::QAB(I),XP(g)
    • S(a);SBLOCK,S_CUTQ(b)::P(C)
    • S(a);S_CUTQ(b)::S(H),XP(e)
    • S(d);S_CUTB(h)::R1(G)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • R(f);SBLOCK,XQ(I)::R1(G)
      • Refutation
        • B(h);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • Q(b);N_GUARD::S(H),XP(e)
      • R(f);SBLOCK,S_CUTB(h)::R1(G)
      • R(f);N_GUARD,S_CUTB(h)::R1(G)
      • B(h);OGATE::QAB(I),XP(g)
      • S(a);SBLOCK,S_CUTQ(b)::P(C)
      • S(a);S_CUTQ(b)::S(H),XP(e)
      • S(d);S_CUTQ(b)::QAB1(I)
      • S(d);S_CUTB(h)::QAR2(I),XR(f)
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