MESON Chess Problem Database

Problem Display
PID: 154522 (4B2n/3Q4/5k2/8/5B1p/7K/8/8 w - - 0 1)

Hannemann, Knud Harald

Svenska Dagbladet, 1927

4B2n/3Q4/5k2/8/5B1p/7K/8/8

#2

4 + 3

4035 Aarsskrift for DSK 1935
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
  • Tries
    • 1.Kg2?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qf7#
      • 1...h3+!
    • 1.Kh2?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qf7#
      • 1...h3!
    • 1.Kg4?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qf7#
      • 1...h3!
    • 1.Kxh4?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6+!
    • 1.Bh5?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Ke7!
    • 1.Qd6+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Kg7!
    • 1.Qe7+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Kxe7!
    • 1.Qg7+?
      • 1...Kf5
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kxg7!
    • 1.Qh7?
      • 1...Sg6
        • 2.Qf7#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Ke6!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Sg6
        • 2.Qf7#

This anticipates 231534(1927), 108912(1967)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAR1(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • P(a);
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
      • Refutation
        • S(c);CHECK
    • Try
      • B(D);
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
      • Refutation
        • S(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAR1(C)
        • S(c);N_GUARD::QAR1(C),XS(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • S(c);N_GUARD::QAR1(C)
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