MESON Chess Problem Database

Problem Display
PID: 7020 (k7/p6r/N1K4p/8/8/8/8/7Q w - - 0 1)

Solheim, Ivar

Schackvarlden, 1935

k7/p6r/N1K4p/8/8/8/8/7Q

#2

3 + 4

4884 154 norske miniatyrproblemer 1974
2786 More Fun with Chess Miniatures 2000
145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7+
      • 2.Kxc7#
    • 1...Rd7
      • 2.Kxd7#
    • 1...Rh8
      • 2.Kb5#
      • 2.Kc5#
      • 2.Kd6#
      • 2.Kc7#
      • 2.Kd7#
  • Tries
    • 1.Sc7+?
      • 1...Rxc7+
        • 2.Kxc7#
      • 1...Kb8!
    • 1.Qd5?
      • threat
        • 2.Qg8#
        • 2.Qd8#
      • 1...Rc7+
        • 2.Kxc7#
      • 1...Rd7
        • 2.Kxd7#
      • 1...Re7
        • 2.Qd8#
      • 1...Rf7
        • 2.Qd8#
      • 1...Rg7
        • 2.Qd8#
      • 1...Rh8
        • 2.Kb5#
        • 2.Kc5#
        • 2.Kd6#
        • 2.Kc7#
        • 2.Kd7#
      • 1...Rb7!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qb8#
      • 1...Rc7+
        • 2.Sxc7#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rh8
        • 2.Sc7#
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(c);CHECK::QAB(A)+K(C),XR(c)
    • R(c);::QAB(A)+K(C),XR(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(c);CHECK,XS(B)::QAB(A)+K(C),XR(c)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK::QAB(A)+K(C),XR(c)
        • R(c);::QAB(A)+K(C),XR(c)
        • R(c);::QAR(A)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • R(c);CHECK,N_GUARD::S(B),XR(c)
      • R(c);N_GUARD::QAB1(A),XR(c)
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