MESON Chess Problem Database

Problem Display
PID: 235280 (2n2R2/3Q4/8/3pkp2/4pr2/N1P3P1/K2P1n1r/1B2N2b w - - 0 1)

Hoffmann, Fritz

Schach, 1973

2n2R2/3Q4/8/3pkp2/4pr2/N1P3P1/K2P1n1r/1B2N2b

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Rxf5#
    • 1...Rh4
      • 2.Rxf5#
    • 1...Sb6
      • 2.Qe7#
    • 1...Sd6
      • 2.Qe7#
    • 1...Sa7
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...d4
      • 2.Sc4#
      • 2.cxd4#
  • Tries
    • 1.Rf6?
      • threat
        • 2.Re6#
        • 2.Qe6#
      • 1...Rh6
        • 2.Qe6#
      • 1...Kxf6!
    • 1.Re8+?
      • 1...Se7
        • 2.Qxe7#
      • 1...Kf6!
    • 1.Qe8+?
      • 1...Se7
        • 2.Qxe7#
      • 1...Kd6!
    • 1.Qc7+?
      • 1...Sd6
        • 2.Qe7#
      • 1...Ke6!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Rxe4
        • 2.Rxf5#
      • 1...Bxe4
        • 2.d4#
      • 1...Sxe4
        • 2.Sd3#
      • 1...dxe4
        • 2.Sc4#
      • 1...fxe4
        • 2.gxf4#
      • 1...Sb6
        • 2.Qe7#
      • 1...Sd6
        • 2.Qe7#
      • 1...Se7
        • 2.Qxe7#
      • 1...d4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD::R1(I),XP(h)
    • S(i);N_GUARD::QAR2(H)
    • S(i);N_GUARD::QAR2(H),XS(i)
  • Tries
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAR1(H)
      • Refutation
        • K(g);S_FLIGHT,XR(I)
    • Try
      • R(I);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(H),XS(i)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(H),XS(i)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(H)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • B(A);XP(d)
    • Threat
      • QAR1(H),XP(f)
    • Vars
      • K(g);P-FLIGHT,XB(A)::QAR2(H)
      • R(e);N_GUARD,SBLOCK,XB(A)::R1(I),XP(h)
      • B(a);SBLOCK,XB(A)::P(D)
      • S(b);N_GUARD,P_PINP(D),SBLOCK,XB(A)::S(B)
      • P(f);N_GUARD,SBLOCK,XB(A)::S(E)
      • P(h);SBLOCK,XB(A)::P(G),XR(e)
      • S(i);N_GUARD::QAR2(H)
      • S(i);N_GUARD::QAR2(H),XS(i)
      • P(f);::QAR1(H)
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