MESON Chess Problem Database

Problem Display
PID: 212970 (8/8/8/8/8/4P1QK/4rPB1/6k1 w - - 0 1)

Hultberg, Gustav Herbert

Land og Folk, 1979

8/8/8/8/8/4P1QK/4rPB1/6k1

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Qh2#
  • Tries
    • 1.Bf1+?
      • 1...Kh1
        • 2.Qh2#
        • 2.Qg2#
      • 1...Kxf1!
    • 1.Bh1+?
      • 1...Kxh1
        • 2.Qh2#
        • 2.Qg2#
      • 1...Kf1!
    • 1.f3?
      • 1...Rxg2
        • 2.Qe1#
        • 2.Qxg2#
      • 1...Re1
        • 2.Qxe1#
      • 1...Ra2
        • 2.Qe1#
      • 1...Rb2
        • 2.Qe1#
      • 1...Rc2
        • 2.Qe1#
      • 1...Rd2
        • 2.Qe1#
      • 1...Rf2
        • 2.Qh2#
      • 1...Rxe3!
  • Keys
    • 1.f4!
      • 1...Rxg2
        • 2.Qe1#
        • 2.Qxg2#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Re1
        • 2.Qxe1#
      • 1...Ra2
        • 2.Qe1#
      • 1...Rb2
        • 2.Qe1#
      • 1...Rc2
        • 2.Qe1#
      • 1...Rd2
        • 2.Qe1#
      • 1...Rf2
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XP(A)::QAB1(D)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XB(B)
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(A);
      • Vars
        • R(b);N_GUARD::QAR2(D),XR(b)
        • R(b);N_GUARD::QAR2(D)
        • R(b);SBLOCK::QAB1(D)
      • Refutation
        • R(b);XP(C)
  • Actual
    • P(A);
    • Vars
      • R(b);OGATE,P_PINQ(D),XP(C)::QAB(D),XR(b)
      • R(b);N_GUARD::QAR2(D),XR(b)
      • R(b);N_GUARD::QAR2(D)
      • R(b);SBLOCK::QAB1(D)
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