MESON Chess Problem Database

Problem Display
PID: 102066 (2b1r1n1/1p1NrN2/1p2k2p/3R1R2/1p6/1P2p1p1/5pB1/5Q1K w - - 0 1)

Neukomm, Gyula (Julius) R

Comm., The Observer, 1920

(First published on Sun Sep 26 1920)

2b1r1n1/1p1NrN2/1p2k2p/3R1R2/1p6/1P2p1p1/5pB1/5Q1K

#2

8 + 12

6490 yacpdb 2009
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Rde5#
    • 1...Rxf7
      • 2.Rfe5#
    • 1...Rd8
      • 2.Sxd8#
    • 1...Rf8
      • 2.Sxf8#
    • 1...Bxd7
      • 2.Rde5#
    • 1...Sf6
      • 2.Rxf6#
    • 1...e2
      • 2.Qxe2#
    • 1...b5
      • 2.Sc5#
    • 1...h5
      • 2.Sg5#
  • Tries
    • 1.Bf3?
      • 1...Rxd7
        • 2.Rde5#
      • 1...Rxf7
        • 2.Rfe5#
      • 1...Bxd7
        • 2.Rde5#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Rd8
        • 2.Sxd8#
      • 1...Rf8
        • 2.Sxf8#
      • 1...e2
        • 2.Qxe2#
      • 1...b5
        • 2.Sc5#
      • 1...h5
        • 2.Sg5#
      • 1...g2+!
    • 1.Be4?
      • threat
        • 2.Rd6#
      • 1...Rxd7
        • 2.Rde5#
      • 1...Rxf7
        • 2.Rfe5#
      • 1...Sf6
        • 2.Rxf6#
      • 1...g2+!
    • 1.Rf4?
      • threat
        • 2.Rd6#
      • 1...Rxd7
        • 2.Re5#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Rxf7!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Rd6#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Rxd7
        • 2.Re5#
      • 1...Rxf7
        • 2.Rxe3#
      • 1...Sf6
        • 2.Rxf6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(i);SBLOCK,XS(G)::R1(E)
    • R(i);SBLOCK,XS(H)::R1(F)
    • R(k);N_GUARD::S(H),XR(k)
    • R(k);N_GUARD::S(G),XR(k)
    • B(j);SBLOCK,XS(G)::R1(E)
    • S(l);N_GUARD::R1(F),XS(l)
    • P(b);OGATEB::QAR(A),XP(b)
    • P(e);N_GUARD::S(G)
    • P(g);N_GUARD::S(H)
  • Tries
    • Try
      • B(C);
      • Vars
        • R(i);SBLOCK,XS(G)::R1(E)
        • R(i);SBLOCK,XS(H)::R1(F)
        • B(j);SBLOCK,XS(G)::R1(E)
        • S(l);N_GUARD::R1(F),XS(l)
        • R(k);N_GUARD::S(H),XR(k)
        • R(k);N_GUARD::S(G),XR(k)
        • P(b);OGATEB::QAR(A),XP(b)
        • P(e);N_GUARD::S(G)
        • P(g);N_GUARD::S(H)
      • Refutation
        • P(c);CHECK
    • Try
      • B(C);
      • Threat
        • R1(E)
      • Vars
        • R(i);SBLOCK,XS(G)::R1(E)
        • R(i);SBLOCK,XS(H)::R1(F)
        • S(l);N_GUARD::R1(F),XS(l)
      • Refutation
        • P(c);CHECK
    • Try
      • R(F);
      • Threat
        • R1(E)
      • Vars
        • R(i);SBLOCK,XS(G)::R1(E)
        • S(l);N_GUARD::R1(F),XS(l)
      • Refutation
        • R(i);XS(H)
  • Actual
    • R(F);
    • Threat
      • R1(E)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XR(E)::QAB1(A)
      • R(i);SBLOCK,XS(G)::R1(E)
      • R(i);SBLOCK,XS(H)::R(F),XP(b)
      • S(l);N_GUARD::R1(F),XS(l)
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