MESON Chess Problem Database

Problem Display
PID: 15736 (n1R5/1pn2B2/pp1Rp3/1kN1K3/2Np4/Q2p4/7p/6b1 w - - 0 1)

Shanshin, Valery Yurevich

Slesarenko, Anatoly Vasilevich

2nd Prize, October Revolution-70 JT, 1987

n1R5/1pn2B2/pp1Rp3/1kN1K3/2Np4/Q2p4/7p/6b1

#2

7 + 11

3297 FIDE Album (1986-1988) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Qa4#
    • 1...Se8
      • 2.Qb3#
      • 2.Qa4#
    • 1...bxc5
      • 2.Qb3#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qb3#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Sd5
        • 2.Be8#
      • 1...a5!
    • 1.Sxe6?
      • threat
        • 2.Qb3#
      • 1...Kxc4
        • 2.Sxd4#
        • 2.Sxc7#
      • 1...Sd5
        • 2.Be8#
        • 2.Rxd5#
      • 1...a5!
    • 1.Be8+?
      • 1...Sxe8
        • 2.Qb3#
        • 2.Qa4#
      • 1...Kxc4!
    • 1.Rd5?
      • threat
        • 2.Qa4#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kc6
        • 2.Be8#
      • 1...bxc5
        • 2.Rxc5#
      • 1...exd5!
    • 1.Rxb6+?
      • 1...Kxc4
        • 2.Qc1#
        • 2.Qb4#
      • 1...Sxb6!
    • 1.Rxc7?
      • threat
        • 2.Qb3#
        • 2.Qa4#
      • 1...Kxc4
        • 2.Qb3#
      • 1...bxc5
        • 2.Rxc5#
        • 2.Qb3#
      • 1...Sxc7!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qa4#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kxc6
        • 2.Be8#
      • 1...bxc5
        • 2.Rxc5#
      • 1...bxc6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(j);::QAB1(A)
    • P(g);SBLOCK,XS(C)::QAR2(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR2(A)
      • Vars
        • K(e);P_SPINP(h),P_SPINS(j),S_FLIGHT,XS(B)::QAR2(A)
        • S(j);N_GUARD::B(F)
      • Refutation
        • P(f);
    • Try
      • S(C);XP(h)
      • Threat
        • QAR2(A)
      • Refutation
        • P(f);
    • Try
      • B(F);CHECK
      • Refutation
        • K(e);S_FLIGHT,XS(B)
    • Try
      • R(E);
      • Threat
        • QAB1(A)
      • Vars
        • K(e);S_FLIGHT,XS(B)::QAB1(A)
        • K(e);P_SPINS(j),S_FLIGHT::B(F)
        • P(g);OGATE,P_SPINP(g),XS(C)::R1(E),XP(g)
      • Refutation
        • P(h);XR(E)
    • Try
      • R(E);CHECK,XP(g)
      • Refutation
        • S(k);XR(E)
    • Try
      • R(G);XS(j)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P_SPINP(h),S_FLIGHT,XS(B)::QAB1(A)
      • Refutation
        • S(k);XR(G)
  • Actual
    • R(E);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);P_SPINP(h),S_FLIGHT,XS(B)::QAB1(A)
      • K(e);OGATEB,P_SPINS(j),S_FLIGHT,XR(E)::B(F)
      • P(g);OGATE,XS(C)::R1(E),XP(g)
      • P(i);SBLOCK,XR(E)::S(B)
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