MESON Chess Problem Database

Problem Display
PID: 46633 (8/6bK/6Q1/8/8/8/1p4R1/r6k w - - 0 1)

Pettersen, Otvind

Dagbladet, 1959

8/6bK/6Q1/8/8/8/1p4R1/r6k

#2

3 + 4

4884 154 norske miniatyrproblemer 1974

SOLUTION

  • SOUND
  • Tries
    • 1.Rg1+?
      • 1...Kh2
        • 2.Qg2#
        • 2.Qg3#
      • 1...Rxg1!
    • 1.Rxb2?
      • threat
        • 2.Qg2#
      • 1...Rg1
        • 2.Qh5#
      • 1...Bxb2!
    • 1.Rg3?
      • threat
        • 2.Rh3#
        • 2.Qh5#
      • 1...b1Q
        • 2.Rh3#
      • 1...b1B
        • 2.Rh3#
      • 1...Ra3
        • 2.Qh5#
      • 1...Ra4
        • 2.Rh3#
      • 1...Ra5
        • 2.Rh3#
      • 1...Be5
        • 2.Qh5#
        • 2.Qh6#
      • 1...Bf6
        • 2.Rh3#
      • 1...Kh2!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Qg2#
      • 1...Rg1
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • R(a);XR(A)
    • Try
      • R(A);XP(c)
      • Threat
        • QAB1(B)
      • Vars
        • R(a);SBLOCK::QAR(B)
      • Refutation
        • B(d);XR(A)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);P_PINQ(B)::R(A)
        • R(a);::QAR(B)
        • R(a);::R(A)
        • B(d);::R(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAB1(B)
    • Vars
      • R(a);SBLOCK::QAR(B)
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