MESON Chess Problem Database

Problem Display
PID: 234945 (8/8/2pRBQq1/5N2/4k3/3N4/2KPnbr1/8 w - - 0 1)

Hoffmann, Fritz

Mitteldeutsche Zeitung, 1991

8/8/2pRBQq1/5N2/4k3/3N4/2KPnbr1/8

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qxf5#
    • 1...c5
      • 2.Bd5#
  • Tries
    • 1.Rd4+?
      • 1...Kf3
        • 2.Se5#
      • 1...Bxd4
        • 2.Sd6#
      • 1...Sxd4+!
  • Keys
    • 1.Sg3+!
      • 1...Qxg3
        • 2.Qf5#
      • 1...Rxg3
        • 2.Sxf2#
      • 1...Bxg3
        • 2.Sc5#
      • 1...Sxg3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE,XS(D)::QAB1(G),XQ(f)
    • P(e);N_GUARD::B(F)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);S_FLIGHT::S(C)
        • B(b);XR(E)::S(D)
      • Refutation
        • S(a);CHECK,XR(E)
  • Actual
    • S(D);CHECK
    • Vars
      • Q(f);XS(D)::QAB1(G)
      • R(c);XS(D)::S(C),XB(b)
      • B(b);XS(D)::S(C)
      • S(a);XS(D)::QAR1(G)
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