MESON Chess Problem Database

Problem Display
PID: 121996 (3K1N2/8/4b2Q/3R4/2krN1R1/P2p4/3pn3/3B2B1 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

Ottawa Citizen, 1886

3K1N2/8/4b2Q/3R4/2krN1R1/P2p4/3pn3/3B2B1

#2

9 + 6

6490 yacpdb 2009
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qxe6#
    • 1...Rxe4
      • 2.Rc5#
    • 1...Bxg4
      • 2.Qc6#
    • 1...Bxd5
      • 2.Qa6#
    • 1...Bf5
      • 2.Qc6#
    • 1...Bd7
      • 2.Rc5#
    • 1...Bf7
      • 2.Qc6#
    • 1...Bc8
      • 2.Qc6#
    • 1...Bg8
      • 2.Qc6#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Rc5#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Bxd5
        • 2.Qa6#
      • 1...Rxd5!
    • 1.Ke7?
      • threat
        • 2.Rc5#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Bxd5
        • 2.Qa6#
      • 1...Rxd5!
  • Keys
    • 1.Qf6!
      • 1...Rxd5+
        • 2.Sd6#
      • 1...Kxd5
        • 2.Qxe6#
      • 1...Rxe4
        • 2.Rc5#
      • 1...Bxg4
        • 2.Qc6#
      • 1...Bxd5
        • 2.Qa6#
      • 1...Sxg1
        • 2.Qxd4#
      • 1...Sc1
        • 2.Qxd4#
      • 1...Bf5
        • 2.Qc6#
      • 1...Bd7
        • 2.Rc5#
      • 1...Bf7
        • 2.Qc6#
      • 1...Bc8
        • 2.Qc6#
      • 1...Bg8
        • 2.Qc6#
      • 1...Sc3
        • 2.Qxd4#
      • 1...Sg3
        • 2.Qxd4#
      • 1...Sf4
        • 2.Qxd4#

This anticipates 11533(1939)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(G),XB(f)
    • R(e);N_PINR(F),P_SPINR(e),XS(D)::R1(F)
    • B(f);OGATE,XR(E)::QAR2(G)
    • B(f);OGATE,SBLOCK,XR(F)::QAB(G)
    • B(f);OGATE::QAR2(G)
    • B(f);N_PINR(F)::R1(F)
  • Tries
    • Try
      • K(H);N_SPINR(F),S_FLIGHT
      • Threat
        • R1(F)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(G),XB(f)
        • B(f);OGATE,SBLOCK,XR(F)::QAB(G)
      • Refutation
        • R(e);XR(F)
    • Try
      • K(H);N_SPINR(F),S_FLIGHT
      • Threat
        • R1(F)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(G),XB(f)
        • B(f);OGATE,SBLOCK,XR(F)::QAB(G)
      • Refutation
        • R(e);XR(F)
  • Actual
    • Q(G);
    • Vars
      • R(e);CHECK,SBLOCK,XR(F)::R(E)+S(D),DCHECK
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(G),XB(f)
      • R(e);N_PINR(F),P_SPINR(e),XS(D)::R1(F)
      • B(f);OGATE,XR(E)::QAR2(G)
      • B(f);OGATE,SBLOCK,XR(F)::QAB(G)
      • S(b);N_GUARD,XB(B)::QAR1(G),XR(e)
      • S(b);N_GUARD::QAR1(G),XR(e)
      • B(f);OGATE::QAR2(G)
      • B(f);N_PINR(F)::R1(F)
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