MESON Chess Problem Database

Problem Display
PID: 103449 (3r4/3pRp2/1p4PB/pQ2P3/Rp1pk1K1/3pP1p1/2Pr4/8 w - - 0 1)

Aksenov, Vitaly I

Sarkits, Anatoly L

2nd Comm., Banska Bystrica (BABY)-50 JT, 1993

3r4/3pRp2/1p4PB/pQ2P3/Rp1pk1K1/3pP1p1/2Pr4/8

#2

9 + 11

4393 Uralski Problemist 1993
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.cxd3#
    • 1...Rf2
      • 2.cxd3#
    • 1...Rg2
      • 2.cxd3#
    • 1...Rh2
      • 2.cxd3#
    • 1...b3
      • 2.Rxd4#
    • 1...dxe3
      • 2.Qc4#
    • 1...d5
      • 2.exd5 ep#
    • 1...d6
      • 2.exd6#
    • 1...f5+
      • 2.exf5 ep#
    • 1...f6
      • 2.exf6#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qxd4#
      • 1...f5+
        • 2.exf5 ep#
      • 1...dxc2!
    • 1.Qc6+?
      • 1...d5
        • 2.exd5 ep#
      • 1...dxc6!
    • 1.e6?
      • threat
        • 2.Qf5#
        • 2.exd7#
        • 2.exf7#
      • 1...f5+
        • 2.Qxf5#
      • 1...dxe6
        • 2.Qf5#
      • 1...fxe6
        • 2.Qf5#
      • 1...fxg6
        • 2.exd7#
      • 1...d5
        • 2.exf7#
      • 1...Rf2
        • 2.cxd3#
        • 2.exd7#
        • 2.exf7#
      • 1...Re8
        • 2.Qf5#
      • 1...d6
        • 2.Qf5#
        • 2.exf7#
      • 1...f6
        • 2.Qf5#
        • 2.exd7#
      • 1...dxe3!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...f5+
        • 2.exf5 ep#
      • 1...bxc4 ep
        • 2.Rxd4#
      • 1...dxc4 ep
        • 2.Qc4#
      • 1...d5
        • 2.exd5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::P(A),XP(b)
    • P(d);OGATE,P_SPINP(e)::R1(C),XP(e)
    • P(e);OGATEB,P_SPINP(d),XP(B)::QAR2(E)
    • P(i);OGATE::R(I)+P(F),XP(i),EP
    • P(i);OGATE::R(I)+P(F),XP(i)
    • P(j);CHECK,OGATE::R(I)+P(F),XP(j),EP
    • P(j);OGATE::R(I)+P(F),XP(j)
  • Tries
    • Try
      • Q(E);P_PINP(e)
      • Threat
        • QAR1(E),XP(e)
      • Vars
        • P(j);CHECK,OGATE::R(I)+P(F),XP(j),EP
      • Refutation
        • P(b);XP(A)
    • Try
      • Q(E);CHECK
      • Vars
        • P(i);OGATE,P_SPINP(i)::R(I)+P(F)DCHECK,XP(i),EP
      • Refutation
        • P(i);XQ(E)
    • Try
      • P(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(j);CHECK::QAB1(E),XP(j)
        • P(i);P_SPINP(i),XP(F)::QAB1(E)
        • P(j);P_SPINP(j),XP(F)::QAB1(E)
        • P(j);XP(G)::R(I)+P(F),XP(i)
        • P(i);::R(I)+P(F),XP(j)
        • R(k);::QAB1(E)
      • Refutation
        • P(e);P_SPINP(d),XP(B)
  • Actual
    • P(A);
    • Threat
      • QAB1(E)
    • Vars
      • P(j);CHECK,OGATE::R(I)+P(F),XP(j),EP
      • P(d);EP,OGATE,P_SPINP(e),XP(A)::R1(C),XP(e)
      • P(e);EP,OGATE,P_SPINP(d),XP(A)::QAR2(E)
      • P(i);OGATE::R(I)+P(F),XP(i),EP
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