MESON Chess Problem Database

Problem Display
PID: 105362 (7n/bKBB1pN1/8/1Rp3Q1/p1kp2pr/P4P2/1PN1Pp2/8 w - - 0 1)

Berezhnoi, Yuri Mikhailovich

Erokhin, Vladimir Alekseevich

2nd Comm., Wola Gulowska, 1997

7n/bKBB1pN1/8/1Rp3Q1/p1kp2pr/P4P2/1PN1Pp2/8

#2

11 + 10

15345 Wola Gulowska Award 1997
6490 yacpdb 2009
56 The Problemist 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bb8
      • 2.Qxc5#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sd6#
      • 1...Kd5
        • 2.Sfe3#
      • 1...Rh6!
    • 1.Be6+?
      • 1...Kxb5
        • 2.Sxd4#
      • 1...fxe6!
    • 1.Qc1?
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Sb4#
      • 1...d3!
    • 1.Qf4?
      • threat
        • 2.Se3#
      • 1...Kd5
        • 2.Qxd4#
      • 1...f1S!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Bd3#
      • 1...Kxb5
        • 2.Bd3#
      • 1...Kd5
        • 2.Be6#
      • 1...d3
        • 2.Bxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(h);N_GUARD::QAR1(G),XP(g)
  • Tries
    • Try
      • S(K);
      • Threat
        • S(K)
      • Vars
        • K(c);P_SPINP(g),S_FLIGHT::QAR(G)+S(K),DCHECK
      • Refutation
        • R(f);
    • Try
      • B(J);CHECK
      • Vars
        • K(c);P_SPINP(g),S_FLIGHT,XR(F)::S(B),XP(d)
      • Refutation
        • P(i);XB(J)
    • Try
      • Q(G);
      • Threat
        • QAR(G)+S(B),DCHECK
      • Vars
        • K(c);P_SPINP(g),S_FLIGHT::S(B)
      • Refutation
        • P(d);
    • Try
      • Q(G);P_PINP(d)
      • Threat
        • S(B)
      • Vars
        • K(c);N_SPINP(d),P_SPINP(g),S_FLIGHT::QAR1(G),XP(d)
      • Refutation
        • P(a);
  • Actual
    • B(J);
    • Threat
      • B(J)
    • Vars
      • K(c);S_FLIGHT,XR(F)::B(J)
      • K(c);P_SPINP(g),S_FLIGHT::QAR(G)+B(J),DCHECK
      • P(d);::B(J),XP(d)
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