MESON Chess Problem Database

Problem Display
PID: 17563 (3bN3/1p2R1n1/3B1p2/1Ppk4/2r1n1QK/1P2PN2/b2p4/7B w - - 0 1)

Hassberg, Eric Manfred

1st Prize, Sjakk-Nytt, 1947

3bN3/1p2R1n1/3B1p2/1Ppk4/2r1n1QK/1P2PN2/b2p4/7B

#2

10 + 10

70 American Chess Problemist 1950

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxe4#
    • 1...Rc2
      • 2.Qxe4#
    • 1...Rc3
      • 2.Qxe4#
    • 1...Sf2
      • 2.Qxc4#
    • 1...Sc3
      • 2.Qxc4#
    • 1...Sg3
      • 2.Qxc4#
    • 1...Sg5
      • 2.Qxc4#
    • 1...Sxd6
      • 2.Sxf6#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
      • 2.Qe6#
      • 2.Qg8#
    • 1...Se6
      • 2.Qf5#
      • 2.Qxe6#
    • 1...Sxe8
      • 2.Qe6#
  • Tries
    • 1.Sxf6+?
      • 1...Kxd6
        • 2.Rd7#
        • 2.Qd7#
      • 1...Sxf6!
    • 1.Sc7+?
      • 1...Kxd6
        • 2.Rd7#
        • 2.Qd7#
      • 1...Bxc7!
    • 1.bxc4+?
      • 1...Bxc4
        • 2.Qxe4#
      • 1...Kxc4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxb7#
      • 1...Sf2+
        • 2.Bf4#
      • 1...Sc3+
        • 2.Bf4#
      • 1...Sg3+
        • 2.Bf4#
      • 1...Sg5+
        • 2.Bf4#
      • 1...Sxd6+
        • 2.Sd4#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Bxe7
        • 2.Sc7#
      • 1...Sxe8
        • 2.Qe6#
      • 1...Bc7
        • 2.Sxc7#
      • 1...b6
        • 2.Qc6#
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::QAB1(E),XS(d)
    • S(d);OGATE,P_PINQ(E)::QAB1(E),XR(c)
    • S(d);N_GUARD,P_PINQ(E),SBLOCK,XB(H)::S(J),XP(g)
    • S(i);CHECK,N_GUARD::QAR2(E),XS(i)
    • S(i);N_GUARD,XS(J)::QAB1(E)
  • Tries
    • Try
      • S(J);CHECK,XP(g)
      • Refutation
        • S(d);P_PINQ(E),XS(J)
    • Try
      • S(J);CHECK
      • Refutation
        • B(j);XS(J)
    • Try
      • P(B);CHECK,XR(c)
      • Vars
        • B(a);XP(B)::QAB1(E),XS(d)
      • Refutation
        • K(f);P_SPINS(d),S_FLIGHT,XP(B)
  • Actual
    • Q(E);
    • Threat
      • QAB(E),XP(h)
    • Vars
      • S(d);CHECK,N_GUARD::QAR(E)+B(H)
      • S(d);CHECK,P_SPINS(d),XB(H)::B(A)+S(D)
      • S(i);CHECK,N_GUARD::QAR2(E),XS(i)
      • B(j);N_GUARD,XR(I)::S(J)
      • S(i);N_GUARD,XS(J)::QAB1(E)
      • B(j);N_GUARD::S(J),XB(j)
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