MESON Chess Problem Database

Problem Display
PID: 240602 (2K5/3n4/1b6/1BBkP1N1/1p1n1pp1/PP1N2P1/1rP1P3/Q7 w - - 0 1)

Hoffmann, Fritz

Thema Danicum, 1988

2K5/3n4/1b6/1BBkP1N1/1p1n1pp1/PP1N2P1/1rP1P3/Q7

#2

12 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qxd4#
    • 1...Ra2
      • 2.Qxd4#
    • 1...Rxc2
      • 2.Qxd4#
    • 1...Rxb3
      • 2.Qxd4#
    • 1...Sc6
      • 2.Bc4#
    • 1...bxa3
      • 2.c4#
    • 1...fxg3
      • 2.e4#
    • 1...f3
      • 2.e4#
  • Tries
    • 1.Qh1+?
      • 1...f3
        • 2.e4#
      • 1...Sf3!
    • 1.gxf4?
      • threat
        • 2.e4#
      • 1...Sxe2
        • 2.Qh1#
      • 1...Sxb5
        • 2.Qh1#
      • 1...Sxc5
        • 2.Sxb4#
      • 1...Sf6!
  • Keys
    • 1.axb4!
      • threat
        • 2.c4#
      • 1...Rxc2
        • 2.Qxd4#
      • 1...Sxc2
        • 2.Qa8#
      • 1...Sxb5
        • 2.Qa8#
      • 1...Sxe5
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(a);OGATE::QAR1(A),XS(c)
    • R(a);OGATE,P_PINB(I),XP(B)::QAR1(A),XS(c)
    • R(a);OGATE,XP(E)::QAR1(A),XS(c)
    • S(c);SBLOCK::B(H)
    • P(b);N_GUARD,XP(D)::P(B)
    • P(d);N_GUARD,XP(G)::P(C)
    • P(d);N_GUARD::P(C)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::P(C)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • P(G);XP(d)
      • Threat
        • P(C)
      • Vars
        • S(c);N_GUARD,XP(C)::QAB(A)
        • S(c);N_GUARD,XB(H)::QAB(A)
        • S(h);SBLOCK,XB(I)::S(F),XP(b)
      • Refutation
        • S(h);
  • Actual
    • P(D);XP(b)
    • Threat
      • P(B)
    • Vars
      • R(a);OGATE,P_PINB(I),XP(B)::QAR1(A),XS(c)
      • S(c);N_GUARD,XP(B)::QAB(A)
      • S(c);N_GUARD,XB(H)::QAB(A)
      • S(h);SBLOCK,XP(J)::S(F),XP(d)
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