MESON Chess Problem Database

Problem Display
PID: 261600 (1N5N/4p3/3p1Pp1/3pk1P1/2P1pRPK/1P2p3/4P3/1B2Q3 w - - 0 1)

Henneberger, Walter

Neue Zurcher Zeitung, 1897

1N5N/4p3/3p1Pp1/3pk1P1/2P1pRPK/1P2p3/4P3/1B2Q3

#2

12 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Sxg6#
      • 2.Qg3#
    • 1...d4
      • 2.Rxe4#
  • Tries
    • 1.Sc6+?
      • 1...Kxf4
        • 2.Sxg6#
        • 2.Qg3#
        • 2.Qf1#
      • 1...Ke6!
    • 1.Rf5+?
      • 1...Kd4
        • 2.Rxd5#
      • 1...Ke6
        • 2.cxd5#
      • 1...gxf5!
    • 1.Qc3+?
      • 1...Kxf4
        • 2.Sxg6#
      • 1...d4
        • 2.Rxe4#
      • 1...Ke6!
    • 1.Qd1?
      • 1...Kxf4
        • 2.Sxg6#
      • 1...Ke6
        • 2.Qxd5#
      • 1...dxc4
        • 2.Rxe4#
      • 1...d4
        • 2.Rxe4#
      • 1...e6
        • 2.Sxg6#
      • 1...exf6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Rxe4#
      • 1...Kd4
        • 2.Sc6#
      • 1...Kxf4
        • 2.Sxg6#
      • 1...Ke6
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::R1(F),XP(b)
  • Tries
    • Try
      • S(K);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::R1(F),XP(c)
        • K(d);N_GUARD,P-FLIGHT,S_CUTP(f)::P(E),XP(c)
      • Refutation
        • P(f);XR(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT,XR(F)::S(L),XP(f)
        • P(c);P_SPINP(c)::R1(F),XP(b)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(d);N_GUARD,S_FLIGHT,XR(F)::S(L),XP(f)
        • K(d);N_GUARD,P-FLIGHT::QAB1(B),XP(c)
        • P(c);N_GUARD,XP(E)::R1(F),XP(b)
        • P(c);N_GUARD::R1(F),XP(b)
        • P(g);SBLOCK::S(L),XP(f)
      • Refutation
        • P(g);XP(J)
  • Actual
    • Q(B);P_PINP(c)
    • Threat
      • R1(F),XP(b)
    • Vars
      • K(d);N_GUARD,N_SPINP(c),P_SPINP(b),S_FLIGHT::S(K)
      • K(d);N_GUARD,N_SPINP(c),S_FLIGHT,XR(F)::S(L),XP(f)
      • K(d);N_GUARD,N_SPINP(c),P-FLIGHT::QAB1(B),XP(c)
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