MESON Chess Problem Database

Problem Display
PID: 205759 (8/5p2/2p2K2/1p6/3pkp2/3R3n/Q7/2NN1b2 w - - 0 1)

Moller, Ferdinand Friedrich

Bochumer Anzeiger, 1925

8/5p2/2p2K2/1p6/3pkp2/3R3n/Q7/2NN1b2

#2

5 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Sf2#
    • 1...Sf2
      • 2.Sxf2#
    • 1...Sg5
      • 2.Sf2#
    • 1...c5
      • 2.Qa8#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Sc3#
        • 2.Qxd4#
        • 2.Qxc6#
      • 1...Bxd3
        • 2.Qxc6#
      • 1...f3
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...b4
        • 2.Qxd4#
        • 2.Qxc6#
      • 1...c5
        • 2.Sc3#
      • 1...bxc4!
    • 1.Qa1?
      • threat
        • 2.Qxd4#
      • 1...Kd5
        • 2.Qxd4#
      • 1...c5
        • 2.Qa8#
      • 1...Bxd3!
    • 1.Qg2+?
      • 1...f3
        • 2.Qxf3#
      • 1...Bxg2!
    • 1.Qa7?
      • threat
        • 2.Qxd4#
      • 1...Kd5
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...c5
        • 2.Qb7#
        • 2.Qa8#
      • 1...Bxd3!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sc5#
      • 1...Kxd3
        • 2.Sc5#
      • 1...Kd5
        • 2.Rxd4#
      • 1...Bxd3
        • 2.Sd2#
      • 1...f3
        • 2.Rxd4#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::S(B)
    • S(b);N_GUARD::S(B),XS(b)
    • P(g);OGATEB::QAB(C)
  • Tries
    • Try
      • Q(C);P_PINP(c)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);XR(D)::QAB(C),XP(g)
        • P(g);::S(B)
      • Refutation
        • P(f);N_SPINP(c),XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(c)
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT::QAR1(C),XP(c)
        • P(g);OGATEB::QAB(C)
      • Refutation
        • B(a);XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(C),XP(e)
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(c)
      • Refutation
        • B(a);XR(D)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(d);S_FLIGHT,XR(D)::S(A)
      • K(d);P_SPINP(c),S_FLIGHT::R1(D),XP(c)
      • B(a);SBLOCK,XR(D)::S(A)
      • P(e);SBLOCK::R1(D),XP(c)
      • P(g);::S(A),XP(g)
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