MESON Chess Problem Database

Problem Display
PID: 211125 (2Nbrr2/1P1Bq1p1/1R1Pn1p1/1P1Nkp2/1BKRp1n1/P2Qp2b/8/8 w - - 0 1)

Hoffmann, Fritz

Schach-Report, 1991

2Nbrr2/1P1Bq1p1/1R1Pn1p1/1P1Nkp2/1BKRp1n1/P2Qp2b/8/8

#2

12 + 13

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Bxd6#
    • 1...Sxd4
      • 2.Qxd4#
    • 1...f4
      • 2.Qxe4#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Rxe4#
      • 1...Sxd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...f4
        • 2.Qxe4#
      • 1...exd3!
    • 1.dxe7?
      • threat
        • 2.Bd6#
        • 2.Rxe6#
      • 1...Rxe7
        • 2.Bd6#
      • 1...Bxb6
        • 2.Bd6#
      • 1...Bxe7
        • 2.Rxe6#
      • 1...Sxd4
        • 2.Bd6#
        • 2.Qxd4#
      • 1...f4
        • 2.Qxe4#
      • 1...Rf6
        • 2.Bd6#
      • 1...Bc7
        • 2.Rxe6#
      • 1...Sf4
        • 2.Bd6#
      • 1...Sg5
        • 2.Bd6#
      • 1...Sc7
        • 2.Bd6#
      • 1...Sc5!
  • Keys
    • 1.b8S!
      • threat
        • 2.Sc6#
      • 1...Qxd6
        • 2.Bxd6#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...f4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(i);OGATE,XP(I)::B(C),XQ(i)
    • S(g);OGATE,XR(E)::QAB1(B),XS(g)
    • P(f);N_GUARD::QAR1(B),XP(c)
  • Tries
    • Try
      • B(C);
      • Threat
        • B(C)+R(E),DCHECK,XP(c)
      • Vars
        • P(f);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • P(c);XQ(B)
    • Try
      • P(I);XQ(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(l);XP(I)::B(C)
        • B(k);XR(H)::B(C)
        • B(k);XP(I)::R1(H),XS(g)
        • P(f);N_GUARD::QAR1(B),XP(c)
        • R(m);::B(C)
        • B(k);::R1(H),XS(g)
        • S(g);::B(C)
      • Refutation
        • S(g);
  • Actual
    • P(J);
    • Threat
      • S(J)
    • Vars
      • Q(i);OGATE,XP(I)::B(C),XQ(i)
      • Q(i);XB(K)::S(J),XQ(i)
      • S(g);OGATE,XR(E)::QAB1(B),XS(g)
      • P(f);N_GUARD::QAR1(B),XP(c)
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