MESON Chess Problem Database

Problem Display
PID: 235676 (2N5/5p2/2p1p3/1b2Bk1K/q7/b3RN1P/3R4/8 w - - 0 1)

Hoffmann, Fritz

Mat, 1977

2N5/5p2/2p1p3/1b2Bk1K/q7/b3RN1P/3R4/8

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sd4#
      • 2.Sh4#
    • 1...Qb3
      • 2.Sd4#
      • 2.Sh4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qg4+
      • 2.hxg4#
    • 1...Qh4+
      • 2.Sxh4#
    • 1...Qa5
      • 2.Sd4#
      • 2.Sh4#
    • 1...Qa6
      • 2.Sd4#
      • 2.Sh4#
    • 1...Qa7
      • 2.Sh4#
    • 1...Qa8
      • 2.Sd4#
      • 2.Sh4#
    • 1...Bc1
      • 2.Sd6#
      • 2.Se7#
    • 1...Bb2
      • 2.Sd6#
      • 2.Se7#
    • 1...Bb4
      • 2.Sd4#
      • 2.Sh4#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Be7
      • 2.Sxe7#
    • 1...Bc4
      • 2.Sd4#
      • 2.Sh4#
    • 1...c5
      • 2.Sd6#
      • 2.Se7#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sh4#
      • 1...Qxd4
        • 2.Sxd4#
      • 1...Qd1
        • 2.Rf4#
      • 1...Be7
        • 2.Sxe7#
      • 1...Be2!
    • 1.Rd7?
      • threat
        • 2.Rxf7#
      • 1...Qg4+
        • 2.hxg4#
      • 1...Qh4+
        • 2.Sxh4#
      • 1...Qa7
        • 2.Sh4#
      • 1...Be7
        • 2.Sxe7#
      • 1...f6!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Se7#
      • 1...Qg4+
        • 2.hxg4#
      • 1...Qh4+
        • 2.Sxh4#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Qa7
        • 2.Sh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD::S(C),XQ(b)
    • Q(b);CHECK,OGATE::P(D),XQ(b)
    • Q(b);CHECK,N_GUARD::S(C),XQ(b)
    • Q(b);N_GUARD::S(C)
    • B(a);N_GUARD::S(G),XB(a)
  • Tries
    • Try
      • R(A);
      • Threat
        • S(C)
      • Vars
        • Q(b);XR(A)::S(C),XQ(b)
        • Q(b);N_GUARD,P_PINS(C)::R1(A)
        • B(a);N_GUARD::S(G),XB(a)
      • Refutation
        • B(c);P_PINS(C)
    • Try
      • R(A);
      • Threat
        • R(A),XP(g)
      • Vars
        • Q(b);CHECK,OGATE::P(D),XQ(b)
        • Q(b);CHECK,N_GUARD::S(C),XQ(b)
        • Q(b);N_GUARD::S(C)
        • B(a);N_GUARD::S(G),XB(a)
      • Refutation
        • P(g);
  • Actual
    • R(A);
    • Threat
      • S(G)
    • Vars
      • Q(b);CHECK,OGATE::P(D),XQ(b)
      • Q(b);CHECK,N_GUARD::S(C),XQ(b)
      • B(a);XR(A)::S(G),XB(a)
      • Q(b);N_GUARD::S(C)
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