MESON Chess Problem Database

Problem Display
PID: 175193 (8/3K3N/5Npn/3ppk2/5r2/3P1QP1/8/8 w - - 0 1)

Hasselkus, Ernst

The Times, 1902

8/3K3N/5Npn/3ppk2/5r2/3P1QP1/8/8

#2

6 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.g4#
    • 1...Sg8
      • 2.g4#
    • 1...e4
      • 2.Qxf4#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...e4
        • 2.Qxf4#
      • 1...g5
        • 2.Se7#
      • 1...Sg4
        • 2.Se7#
      • 1...Sg8
        • 2.Se3#
        • 2.g4#
      • 1...Rxf3!
    • 1.Qh5+?
      • 1...g5
        • 2.Qxg5#
      • 1...gxh5!
  • Keys
    • 1.Sg8!
      • threat
        • 2.Sxh6#
        • 2.Se7#
      • 1...Rxf3
        • 2.Sxh6#
      • 1...Sxg8
        • 2.g4#
      • 1...e4
        • 2.Qxf4#
      • 1...g5
        • 2.Se7#
      • 1...Sg4
        • 2.Se7#
      • 1...Sf7
        • 2.Se7#
        • 2.g4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD::P(C)
    • P(c);N_GUARD::QAR1(B),XR(a)
  • Tries
    • Try
      • S(D);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);N_GUARD::QAR1(B),XR(a)
        • P(e);::S(D)
        • S(f);::S(D)
      • Refutation
        • R(a);N_SPINR(a),XQ(B)
    • Try
      • Q(B);CHECK,N_PINR(a)
      • Vars
        • P(e);P_SPINP(e)::QAR1(B),XP(e)
      • Refutation
        • P(e);XQ(B)
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);N_SPINR(a),XQ(B)::S(D),XS(f)
      • S(f);N_GUARD,XS(D)::P(C)
      • P(c);N_GUARD::QAR1(B),XR(a)
      • P(e);::S(D)
      • S(f);::S(D)
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