MESON Chess Problem Database

Problem Display
PID: 238284 (4B3/3Kn3/5kN1/4pN2/7n/4Q3/8/5R2 w - - 0 1)

Segers, Marcel

Norsk Sjakkblad, 1934

4B3/3Kn3/5kN1/4pN2/7n/4Q3/8/5R2

#2

6 + 4

15148 Sadier Collection 2021
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3+?
      • 1...Sf3
        • 2.Qxe5#
      • 1...Shf5
        • 2.Sh5#
      • 1...Sef5
        • 2.Sh5#
      • 1...Kg7!
    • 1.Sfxe7+?
      • 1...Kg7
        • 2.Rf7#
      • 1...Sf3
        • 2.Qxe5#
      • 1...Sf5!
    • 1.Sg7+?
      • 1...Sf3
        • 2.Qxe5#
      • 1...Shf5
        • 2.Sh5#
      • 1...Sef5
        • 2.Sh5#
      • 1...Kxg7!
    • 1.Sgxe7?
      • threat
        • 2.Sd5#
        • 2.Sg8#
      • 1...Sxf5
        • 2.Qh6#
      • 1...Sf3
        • 2.Qh6#
      • 1...e4!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qxh4#
      • 1...Shxf5
        • 2.Sxe7#
      • 1...Shxg6
        • 2.Sxe7#
      • 1...Sexf5
        • 2.Sxh4#
      • 1...Sexg6
        • 2.Sxh4#
      • 1...Sf3
        • 2.Sgxe7#
      • 1...Sg2
        • 2.Sgxe7#

This anticipates 115889(1937)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(B),XP(b)
        • S(a);P_SPINS(a)::S(C)
        • S(d);P_SPINS(d)::S(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(C);CHECK,XS(d)
      • Vars
        • K(c);OGATE,S_FLIGHT::R1(A)
        • S(a);P_SPINS(a)::QAB1(B),XP(b)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(C);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(B),XP(b)
        • S(a);P_SPINS(a)::S(C)
        • S(d);P_SPINS(d)::S(C)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • S(D);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD,P_SPINS(a),XS(C)::QAR2(B)
        • S(a);N_GUARD::QAR2(B)
      • Refutation
        • P(b);
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XS(a)
    • Vars
      • S(a);N_GUARD,P_SPINS(a),XS(C)::QAR(B)+S(D),XS(d)
      • S(a);N_GUARD,P_SPINS(a),XS(D)::R(A)+S(C),XS(d)
      • S(d);N_GUARD,P_SPINS(d),XS(C)::QAR(B)+S(D),XS(a)
      • S(d);N_GUARD,P_SPINS(d),XS(D)::R(A)+S(C),XS(a)
      • S(a);N_GUARD::QAR(B)+S(D),XS(d)
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