MESON Chess Problem Database

Problem Display
PID: 105369 (3R2BB/7Q/2nr2RK/2q1P3/Nnrk1p2/4pP2/8/6N1 w - - 0 1)

Erokhin, Vladimir Alekseevich

4th Prize, Czech Ty., 1974

3R2BB/7Q/2nr2RK/2q1P3/Nnrk1p2/4pP2/8/6N1

#2

10 + 8

6490 yacpdb 2009
133 The Problemist Supplement 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Rgxd6#
    • 1...Sd3
      • 2.Se2#
  • Tries
    • 1.Rgxd6+?
      • 1...Qd5
        • 2.Se2#
        • 2.Qe4#
      • 1...Sd5
        • 2.Se2#
        • 2.Qe4#
      • 1...Qxd6+!
    • 1.Rf6?
      • threat
        • 2.Qe4#
      • 1...Kxe5
        • 2.Rfxd6#
      • 1...Qxe5
        • 2.Se2#
      • 1...Qd5!
  • Keys
    • 1.Re6!
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Rexd6#
      • 1...Qd5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(d);P-FLIGHT::QAB(G)+R(E),DCHECK,XR(h)
    • S(b);SBLOCK::S(A)
  • Tries
    • Try
      • R(E);CHECK,N_SPINR(E),XR(h)
      • Refutation
        • Q(f);CHECK,P_SPINQ(f),XR(E)
    • Try
      • R(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(d);N_SPINR(h),S_FLIGHT,XP(D)::B(J)+R(E),XR(h)
        • Q(f);SBLOCK,XP(D)::S(A)
      • Refutation
        • Q(f);N_SPINR(h)
  • Actual
    • R(E);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);P-FLIGHT::B(I)+R(E),DCHECK,XR(h)
      • Q(f);N_SPINR(h),SBLOCK::S(A)
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