MESON Chess Problem Database

Problem Display
PID: 88226 (8/3R4/8/4B1bQ/4p3/8/2N2knN/7K w - - 0 1)

Becker, S

1st Comm., Wurzburg-75 JT, 1949

8/3R4/8/4B1bQ/4p3/8/2N2knN/7K

#2

6 + 4

70 American Chess Problemist 1950
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Rxd2#
    • 1...Bh4
      • 2.Rd2#
    • 1...Bf6
      • 2.Rd2#
    • 1...Be7
      • 2.Rd2#
    • 1...Bd8
      • 2.Rd2#
    • 1...Se3
      • 2.Rd2#
    • 1...e3
      • 2.Qf3#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Sg4#
        • 2.Qf1#
      • 1...Sf4
        • 2.Qe1#
      • 1...Se1
        • 2.Qxe1#
      • 1...Se3
        • 2.Rd2#
        • 2.Qe1#
        • 2.Qd2#
      • 1...Bf4!
    • 1.Qg4?
      • threat
        • 2.Bg3#
        • 2.Qxg2#
      • 1...Bf4
        • 2.Qxg2#
      • 1...Bh4
        • 2.Rd2#
        • 2.Qxg2#
      • 1...Se1
        • 2.Bg3#
      • 1...Se3
        • 2.Bg3#
        • 2.Rd2#
      • 1...Sh4
        • 2.Bg3#
      • 1...Sf4!
    • 1.Qxg5?
      • threat
        • 2.Rd2#
        • 2.Qd2#
        • 2.Qxg2#
      • 1...Ke2
        • 2.Rd2#
        • 2.Qd2#
        • 2.Qxg2#
      • 1...Se1
        • 2.Rd2#
        • 2.Qd2#
        • 2.Qe3#
      • 1...Se3
        • 2.Rd2#
        • 2.Qxe3#
      • 1...Sh4
        • 2.Rd2#
        • 2.Qd2#
        • 2.Qe3#
      • 1...e3
        • 2.Qxg2#
      • 1...Sf4!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qxg2#
      • 1...Ke2
        • 2.Qxg2#
      • 1...Se1
        • 2.Qf1#
      • 1...Se3
        • 2.Rd2#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sh4
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(d);N_GUARD::R(F),XB(d)
    • B(d);N_GUARD::R(F)
    • S(b);S_CUTB(d)::R(F)
    • P(c);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAB1(E)
        • S(b);N_GUARD::QAB1(E),XS(b)
      • Refutation
        • B(d);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);::QAR1(E),XS(b)
        • S(b);::B(D)
      • Refutation
        • S(b);
    • Try
      • Q(E);XB(d)
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR1(E),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XS(b)
    • Vars
      • K(a);P-FLIGHT::QAR2(E),XS(b)
      • S(b);OGATE::QAR1(E)
      • S(b);S_CUTB(d)::R(F)
      • S(b);N_GUARD,S_CUTB(d)::QAB1(E)
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