MESON Chess Problem Database

Problem Display
PID: 142921 (3N2K1/r5p1/2PpQ3/2p5/q2k4/1b2R3/B1pr1PN1/8 w - - 0 1)

Ellerman, Arnoldo

Norsk Sjakkblad, 1919

3N2K1/r5p1/2PpQ3/2p5/q2k4/1b2R3/B1pr1PN1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Sxc6#
    • 1...Rf7
      • 2.Qe4#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bxe6+
      • 2.Sxe6#
    • 1...c4
      • 2.Qxd6#
    • 1...d5
      • 2.Qg4#
  • Keys
    • 1.Se1!
      • threat
        • 2.Sf3#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Qxc6
        • 2.Sxc6#
      • 1...Rxf2
        • 2.Rd3#
      • 1...Rd3
        • 2.Rxd3#
      • 1...c4
        • 2.Qxd6#
      • 1...d5
        • 2.Qg4#
      • 1...Rf7
        • 2.Qe4#
      • 1...Bd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(d);XP(E)::S(G),XQ(d)
    • R(h);N_PINQ(F)::QAR1(F)
    • B(c);N_GUARD::QAR1(F),XB(c)
    • B(c);CHECK,XQ(F)::S(G),XB(c)
    • P(f);N_PINQ(F),SBLOCK::QAR2(F),XP(g)
    • P(g);N_PINQ(F),SBLOCK::QAR(F)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(c);CHECK,XQ(F)::S(G),XB(c)
      • Q(d);XP(E)::S(G),XQ(d)
      • R(b);N_GUARD,XP(B)::R1(D)
      • R(b);N_GUARD::R1(D),XR(b)
      • P(f);N_PINQ(F),SBLOCK::QAR2(F),XP(g)
      • P(g);N_PINQ(F),SBLOCK::QAR(F)
      • R(h);N_PINQ(F)::QAR1(F)
      • B(c);N_GUARD::QAR1(F),XB(c)
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