MESON Chess Problem Database

Problem Display
PID: 235571 (8/8/8/4Q3/BpR5/1q1p1R1K/2N1P3/3kB3 w - - 0 1)

Hannelius, Jan Ingvar

Freie Presse, 1979

8/8/8/4Q3/BpR5/1q1p1R1K/2N1P3/3kB3

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qa1+?
      • 1...Kxe2
        • 2.Sd4#
        • 2.Rf2#
      • 1...Qb1!
    • 1.Qe3?
      • threat
        • 2.Qd2#
      • 1...d2
        • 2.Qxd2#
      • 1...Qc3!
  • Keys
    • 1.Rf1!
      • threat
        • 2.Bxb4#
      • 1...dxc2+
        • 2.Bc3#
      • 1...dxe2+
        • 2.Se3#
      • 1...d2+
        • 2.Bg3#
      • 1...Kc1
        • 2.Bxb4#
      • 1...Qc3
        • 2.Bxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • P(c);::QAR1(H),XP(c)
      • Refutation
        • Q(b);
  • Actual
    • R(D);
    • Threat
      • R(D)+B(A),XP(d)
    • Vars
      • P(c);CHECK,SBLOCK,XS(B)::R(D)+B(A)
      • P(c);CHECK,SBLOCK,XP(C)::S(B)
      • P(c);CHECK,SBLOCK::R(D)+B(A)
      • K(a);P-FLIGHT::R(D)+B(A),XP(d)
      • Q(b);::R(D)+B(A),XQ(b)
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