MESON Chess Problem Database

Problem Display
PID: 101127 (2Q1b3/2R5/pr4pB/3p4/8/2b3p1/K1k1nN2/1R6 w - - 0 1)

Moller, Herbert

Good Companions, 1920

2Q1b3/2R5/pr4pB/3p4/8/2b3p1/K1k1nN2/1R6

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2+
      • 2.Rxb2#
    • 1...Rd6
      • 2.Rb2#
    • 1...Re6
      • 2.Rb2#
    • 1...Rf6
      • 2.Rb2#
    • 1...Bb5
      • 2.Rb2#
    • 1...Sc1+
      • 2.Rxc1#
    • 1...Sg1
      • 2.Rc1#
      • 2.Rxc3#
    • 1...Sd4
      • 2.Rc1#
      • 2.Rxc3#
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxe2#
      • 1...Rb2+
        • 2.Rxb2#
      • 1...Sc1+
        • 2.Rxc1#
      • 1...Sf4
        • 2.Qd1#
      • 1...Rc6
        • 2.Qa4#
      • 1...Re6
        • 2.Rb2#
      • 1...Bb5
        • 2.Rb2#
      • 1...Bc6
        • 2.Qxg6#
      • 1...Sg1
        • 2.Rc1#
        • 2.Qd1#
      • 1...Sd4
        • 2.Rc1#
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(g);CHECK,N_GUARD::R1(A),XR(g)
    • R(g);N_GUARD::R1(A)
    • B(i);S_CUTR(g)::R1(A)
    • S(b);CHECK,N_GUARD::R1(A),XS(b)
  • Actual
    • Q(F);
    • Threat
      • QAR2(F),XS(b)
    • Vars
      • R(g);CHECK,N_GUARD::R1(A),XR(g)
      • S(b);CHECK,N_GUARD::R1(A),XS(b)
      • S(b);OGATE::QAB1(F)
      • R(g);N_GUARD,N_SPINB(c),S_CUTB(i)::QAB(F)
      • R(g);N_GUARD::R1(A)
      • B(i);S_CUTR(g)::R1(A)
      • B(i);N_GUARD,N_SPINB(c),S_CUTR(g)::QAB(F),XP(h)
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