MESON Chess Problem Database

Problem Display
PID: 277929 (8/3p3B/2p2Q2/K1p1r3/p1k1bn1R/2N1P3/PPP5/r1R5 w - - 0 1)

Hasenzahl, Karl

1st HM., To Mat, 1953

8/3p3B/2p2Q2/K1p1r3/p1k1bn1R/2N1P3/PPP5/r1R5

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Bd3#
    • 1...Bg2
      • 2.Bd3#
    • 1...Bd3
      • 2.Bxd3#
      • 2.cxd3#
    • 1...Bf3
      • 2.Bd3#
    • 1...Bd5
      • 2.Bd3#
    • 1...Sg2
      • 2.Qf1#
    • 1...Sh3
      • 2.Qf1#
    • 1...Sd5
      • 2.Qf1#
    • 1...Sh5
      • 2.Qf1#
    • 1...Se6
      • 2.Qf1#
    • 1...Sg6
      • 2.Qf1#
  • Tries
    • 1.Sxa4?
      • threat
        • 2.Sb6#
      • 1...Kd5
        • 2.Sb6#
        • 2.c4#
      • 1...Sd5
        • 2.Qf1#
        • 2.b3#
      • 1...Rxa2!
    • 1.Qxc6?
      • threat
        • 2.Qxa4#
        • 2.Qb5#
        • 2.Qa6#
      • 1...Rxa2
        • 2.Qb5#
        • 2.Qa6#
      • 1...Bxc2
        • 2.Qb5#
        • 2.Qa6#
      • 1...Bxc6
        • 2.Bd3#
      • 1...Re6
        • 2.Qxa4#
        • 2.Qb5#
      • 1...Sd3
        • 2.Qb5#
        • 2.Qa6#
      • 1...Sd5
        • 2.Qb5#
        • 2.Qa6#
      • 1...a3
        • 2.Qa4#
        • 2.Qb5#
        • 2.Qa6#
      • 1...dxc6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sb6#
      • 1...Kxd5
        • 2.c4#
      • 1...Rxd5
        • 2.Qc3#
      • 1...Bxd5
        • 2.Bd3#
      • 1...Sxd5
        • 2.Qf1#
      • 1...cxd5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • B(d);OGATE,P_SPINS(e)::B(J)
    • S(e);OGATE,P_SPINB(d)::QAB(I)
  • Tries
    • Try
      • S(E);XP(b)
      • Threat
        • S(E)
      • Refutation
        • R(a);P_PINS(E),XP(B)
    • Try
      • Q(I);P_PINP(f),XP(h)
      • Threat
        • DUALS(3)
      • Vars
        • B(d);N_SPINP(f),OGATE,P_SPINS(e),XQ(I)::B(J)
      • Refutation
        • P(i);N_SPINP(f),XQ(I)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);OGATE,S_FLIGHT,XS(E)::P(D)
      • R(g);OGATE,SBLOCK,XS(E)::QAR1(I)
      • B(d);OGATE,P_SPINS(e),SBLOCK,XS(E)::B(J)
      • S(e);OGATE,P_SPINB(d),SBLOCK,XS(E)::QAB(I)
      • P(h);OGATE,SBLOCK,XS(E)::QAB(I)
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