MESON Chess Problem Database

Problem Display
PID: 84769 (8/2p2K2/B3QN1b/6B1/6p1/rR3q2/4Nkpr/1R6 w - - 0 1)

Hassberg, Eric Manfred

3rd Prize, American Chess Bulletin, 1949

8/2p2K2/B3QN1b/6B1/6p1/rR3q2/4Nkpr/1R6

#2

8 + 8

70 American Chess Problemist 1950
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Qxe2#
    • 1...Qe4
      • 2.Sxe4#
    • 1...Qd5
      • 2.Sxg4#
    • 1...Qc6
      • 2.Sxg4#
      • 2.Qe3#
    • 1...Qb7
      • 2.Sxg4#
      • 2.Qe3#
    • 1...Qa8
      • 2.Sxg4#
      • 2.Qe3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qg3
      • 2.Se4#
    • 1...Qh3
      • 2.Se4#
    • 1...Qf5
      • 2.Qxf5#
      • 2.Qe3#
    • 1...Qxf6+
      • 2.Qxf6#
  • Tries
    • 1.Rxf3+?
      • 1...Kxf3
        • 2.Qf5#
      • 1...gxf3
        • 2.Se4#
        • 2.Sg4#
      • 1...Rxf3!
  • Keys
    • 1.Sg1!
      • threat
        • 2.Qe1#
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...Kg3
        • 2.Qe1#
      • 1...Qxb3
        • 2.Se4#
      • 1...Qd1
        • 2.Qe3#
      • 1...Qe2
        • 2.Qxe2#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Qd5
        • 2.Sxg4#
      • 1...Qc3
        • 2.Se4#
      • 1...Qe3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_PINS(G),OGATE,XS(B)::QAR1(F),XQ(e)
    • Q(e);N_PINS(G)::S(G),XQ(e)
    • Q(e);N_PINS(G),P_PINQ(F)::S(G),XP(f)
    • Q(e);N_GUARD,N_PINS(G)::QAB1(F),XQ(e)
    • Q(e);N_PINS(G)::S(G)
    • Q(e);CHECK,OGATE,XS(G)::QAR(F),XQ(e)
  • Tries
    • Try
      • R(C);CHECK,N_SPINS(G),XQ(e)
      • Vars
        • K(a);P-FLIGHT,XR(C)::QAR2(F)
      • Refutation
        • R(d);P_PINS(G),XR(C)
  • Actual
    • S(B);
    • Threat
      • QAB1(F)
    • Vars
      • Q(e);CHECK,OGATE,XS(G)::QAR(F),XQ(e)
      • K(a);P_SPINQ(e),S_FLIGHT::QAB(F)
      • Q(e);N_PINS(G),P_PINQ(F),XR(C)::S(G)
      • Q(e);N_GUARD,N_PINS(G)::QAB1(F)
      • Q(e);N_GUARD,N_PINS(G)::QAR1(F),XQ(e)
      • Q(e);N_PINS(G)::S(G),XQ(e)
      • Q(e);N_PINS(G),P_PINQ(F)::S(G),XP(f)
      • Q(e);N_PINS(G)::S(G)
      • Q(e);N_GUARD,N_PINS(G)::QAB1(F),XQ(e)
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