MESON Chess Problem Database

Problem Display
PID: 261066 (2b2B2/8/6pR/1ppBkp2/1p6/4N3/3Q4/4K2R w - - 0 1)

Felber, Stefan

Neue Zurcher Zeitung, 2011

2b2B2/8/6pR/1ppBkp2/1p6/4N3/3Q4/4K2R

#2

7 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qb2#
    • 1...g5
      • 2.Bd6#
  • Tries
    • 1.Rf1?
      • threat
        • 2.Qb2#
      • 1...Kf6
        • 2.Sg4#
      • 1...c4!
    • 1.R1h4?
      • threat
        • 2.Qb2#
      • 1...c4
        • 2.Qd4#
      • 1...Kf6!
    • 1.R6h4?
      • threat
        • 2.Qb2#
      • 1...c4
        • 2.Qd4#
      • 1...Kf6!
    • 1.Rxg6?
      • threat
        • 2.Bd6#
      • 1...Kf4
        • 2.Sc4#
        • 2.Bd6#
      • 1...Be6!
  • Keys
    • 1.R1h5!
      • threat
        • 2.Sg4#
      • 1...Kf4
        • 2.Bd6#
      • 1...Kf6
        • 2.Qb2#
      • 1...gxh5
        • 2.Bd6#
      • 1...g5
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);SBLOCK::QAB(C)
    • P(f);::B(G)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAB(C)
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT::S(D)
      • Refutation
        • P(c);
    • Try
      • R(B);
      • Threat
        • QAB(C)
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • K(d);P_SPINP(f),S_FLIGHT
    • Try
      • R(F);
      • Threat
        • QAB(C)
      • Vars
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(F);XP(f)
      • Threat
        • B(G)
      • Refutation
        • B(g);
  • Actual
    • R(B);P_PINP(e)
    • Threat
      • S(D)
    • Vars
      • K(d);N_GUARD,N_SPINP(e),S_FLIGHT::B(G)
      • K(d);N_GUARD,N_SPINP(e),P_SPINP(f),S_FLIGHT::QAB(C)
      • P(f);N_SPINP(e),XR(B)::B(G)
      • P(f);N_SPINP(e)::B(G)
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