MESON Chess Problem Database

Problem Display
PID: 170160 (1bB1K3/r3p2R/2Pk4/2r5/1N6/4Q3/8/8 w - - 0 1)

Hoffmann, Martin Wolfgang

Tages-Anzeiger, 1983

(First published on Sat May 7 1983)

1bB1K3/r3p2R/2Pk4/2r5/1N6/4Q3/8/8

#2

6 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxe7#
    • 1...Ra2
      • 2.Qxe7#
    • 1...Ra3
      • 2.Qxe7#
    • 1...Ra4
      • 2.Qxe7#
    • 1...Ra5
      • 2.Qxe7#
    • 1...Ra6
      • 2.Qxe7#
    • 1...Rc7
      • 2.Qe6#
    • 1...Ra8
      • 2.Qxe7#
    • 1...Bc7
      • 2.Qe6#
      • 2.Qxe7#
    • 1...e5
      • 2.Qh6#
    • 1...e6
      • 2.Qxe6#
  • Tries
    • 1.Qd4+?
      • 1...Kc7
        • 2.Qd8#
      • 1...Rd5!
    • 1.Qf4+?
      • 1...e5
        • 2.Qh6#
        • 2.Qf6#
      • 1...Re5!
    • 1.Qg3+?
      • 1...e5
        • 2.Qg6#
      • 1...Re5!
  • Keys
    • 1.c7!
      • threat
        • 2.Qxe7#
      • 1...Kxc7
        • 2.Qxc5#
      • 1...Rcxc7
        • 2.Qd4#
      • 1...Raxc7
        • 2.Qe6#
      • 1...Re5
        • 2.Qb6#
      • 1...e5
        • 2.Qh6#
      • 1...e6
        • 2.Rd7#
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD::QAB1(A),XP(d)
    • R(c);SBLOCK::QAR1(A)
    • P(d);N_GUARD,SBLOCK::QAR(A)
    • P(d);::QAR1(A),XP(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(d),S_FLIGHT::QAB1(A)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);N_GUARD,P_SPINP(d),SBLOCK::QAR(A)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • P(C);
    • Threat
      • QAB1(A),XP(d)
    • Vars
      • K(b);P_SPINP(d),S_FLIGHT,XP(C)::QAR2(A),XR(a)
      • R(a);N_GUARD,SBLOCK,XP(C)::QAR2(A)
      • R(c);SBLOCK,XP(C)::QAR1(A)
      • R(a);OGATE,SBLOCK::QAR2(A)
      • P(d);N_GUARD,SBLOCK::QAR(A)
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