MESON Chess Problem Database

Problem Display
PID: 102839 (1n6/8/2nR2p1/N1P1k1P1/2Pq2pr/2Q3P1/2B1K1p1/4R1N1 w - - 0 1)

Doormann, Hans

Hamburger Fremdenblatt, 1933

1n6/8/2nR2p1/N1P1k1P1/2Pq2pr/2Q3P1/2B1K1p1/4R1N1

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qxd4#
    • 1...Sxa5
      • 2.Qxd4#
    • 1...Sa7
      • 2.Qxd4#
    • 1...Se7
      • 2.Qxd4#
    • 1...Sd8
      • 2.Qxd4#
    • 1...Sa6
      • 2.Sxc6#
    • 1...Sd7
      • 2.Sxc6#
  • Tries
    • 1.Rxd4?
      • threat
        • 2.Kd1#
        • 2.Kd2#
        • 2.Kf2#
        • 2.Qe3#
      • 1...Sxd4+
        • 2.Kd1#
        • 2.Kd2#
        • 2.Kf2#
      • 1...Ke6!
    • 1.Qe3+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qxe3+!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qf6#
      • 1...Qf2+
        • 2.Kxf2#
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Qd1+
        • 2.Kxd1#
      • 1...Qd2+
        • 2.Kxd2#
      • 1...Qd3+
        • 2.Kxd3#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...gxf3+
        • 2.Sxf3#
      • 1...Qxd6
        • 2.Qe4#
        • 2.Qe3#
      • 1...Qf4
        • 2.Qd5#
        • 2.Qxf4#
        • 2.gxf4#
      • 1...Sd7
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • S(f);N_GUARD::QAB1(E),XQ(b)
    • S(f);N_GUARD,XS(H)::QAB1(E),XQ(b)
    • S(h);N_GUARD::S(H),XS(f)
  • Tries
    • Try
      • R(K);XQ(b)
      • Threat
        • DUALS(4)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);CHECK,N_PINQ(b)
      • Vars
        • Q(b);N_GUARD,P_PINQ(E),P_SPINQ(b)::QAR1(E),XQ(b)
      • Refutation
        • Q(b);CHECK,XQ(E)
  • Actual
    • Q(E);N_PINQ(b)
    • Threat
      • QAB1(E)
    • Vars
      • Q(b);CHECK::R(A)+K(D),XQ(b)
      • Q(b);CHECK,N_GUARD::QAR2(E),XQ(b)
      • Q(b);CHECK,XP(G)::S(H),XQ(b)
      • Q(b);CHECK,N_GUARD::QAR1(E),XQ(b)
      • P(c);CHECK,XQ(E)::S(B),XP(c)
      • S(h);N_GUARD::S(H),XS(f)
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