MESON Chess Problem Database

Problem Display
PID: 190945 (3R4/3q1r2/4Bp2/8/2p4b/5Q1K/Nprk2N1/8 w - - 0 1)

Niestroj, Georg

Neue Osnabrucker Zeitung, 2001

(First published on Sat Nov 17 2001)

3R4/3q1r2/4Bp2/8/2p4b/5Q1K/Nprk2N1/8

#2

6 + 8

16210 Problemschach-Jahrbuch (2001) 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qd5
      • 2.Rxd5#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Rf8
      • 2.Rxd7#
  • Tries
    • 1.Qf2+?
      • 1...Kd1
        • 2.Se3#
      • 1...Kd3
        • 2.Bf5#
        • 2.Qe3#
      • 1...Bxf2!
  • Keys
    • 1.Bg4!
      • threat
        • 2.Qd1#
        • 2.Qe2#
        • 2.Qe3#
      • 1...Rc1
        • 2.Qe2#
      • 1...Rc3
        • 2.Qxc3#
      • 1...b1Q
        • 2.Qe2#
        • 2.Qe3#
      • 1...b1R
        • 2.Qe2#
        • 2.Qe3#
      • 1...Qd3
        • 2.Qe3#
      • 1...Re7
        • 2.Qd1#
      • 1...Bf2
        • 2.Qd1#
        • 2.Qe2#
      • 1...Bg5
        • 2.Qd1#
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_PINB(E),OGATE::R(F),XQ(g)
    • R(h);N_GUARD::R(F),XQ(g)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::S(B)
      • Refutation
        • B(e);XQ(C)
  • Actual
    • B(E);
    • Threat
      • DUALS(3)
    • Vars
      • R(b);::QAR1(C)
      • R(b);N_GUARD,P_PINQ(C)::QAB1(C),XR(b)
      • Q(g);N_PINB(E),P_PINQ(C)::QAB1(C)
      • R(h);::QAR1(C)
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