MESON Chess Problem Database

Problem Display
PID: 167101 (b7/3p4/p2QNp1p/2B5/r1pPkpP1/4pp2/4B3/5R1K w - - 0 1)

Shanshin, Valery Yurevich

3rd Prize, Olympic Ty., 2016

b7/3p4/p2QNp1p/2B5/r1pPkpP1/4pp2/4B3/5R1K

#2

8 + 11

145 StrateGems 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxf4#
    • 1...f5
      • 2.Qe5#
    • 1...dxe6
      • 2.Qxe6#
  • Tries
    • 1.Sxf4?
      • threat
        • 2.Bxf3#
      • 1...fxe2
        • 2.Qe7#
      • 1...f2!
    • 1.Sg5+?
      • 1...fxg5
        • 2.Qe5#
      • 1...hxg5!
    • 1.Sc7?
      • threat
        • 2.Qe7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...fxe2!
    • 1.Bxc4?
      • threat
        • 2.Qxf4#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Rxc4!
    • 1.Bb6?
      • threat
        • 2.Sc5#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Bd5
        • 2.Qxf4#
      • 1...Ra5!
    • 1.Ba7?
      • threat
        • 2.Sc5#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Bd5
        • 2.Qxf4#
      • 1...Ra5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Sc7#
      • 1...Kd5
        • 2.Bxf3#
      • 1...fxe2
        • 2.Sxf4#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Bd5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(k);SBLOCK::QAR1(G),XP(f)
    • P(h);N_GUARD::QAR1(G)
    • P(j);OGATE,XS(H)::QAR2(G),XP(j)
  • Tries
    • Try
      • S(H);XP(f)
      • Threat
        • B(C),XP(b)
      • Vars
        • P(b);XB(C)::QAR(G)
      • Refutation
        • P(b);
    • Try
      • S(H);CHECK
      • Vars
        • P(h);XS(H)::QAR1(G)
      • Refutation
        • P(i);XS(H)
    • Try
      • S(H);
      • Threat
        • QAR(G)
      • Vars
        • B(k);N_GUARD::QAB1(G),XB(k)
      • Refutation
        • P(b);XB(C)
    • Try
      • B(C);XP(d)
      • Threat
        • QAR1(G),XP(f)
      • Vars
        • P(j);OGATE,XS(H)::QAR2(G),XP(j)
      • Refutation
        • R(c);XB(C)
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • P(j);OGATE,XS(H)::QAR2(G),XP(j)
        • B(k);SBLOCK::QAR1(G),XP(f)
      • Refutation
        • R(c);
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • P(j);OGATE,XS(H)::QAR2(G),XP(j)
        • B(k);SBLOCK::QAR1(G),XP(f)
      • Refutation
        • R(c);
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+S(H)
    • Vars
      • K(e);S_FLIGHT::B(C),XP(b)
      • P(b);XB(C)::QAR(G)+S(H),XP(f)
      • P(j);OGATE,P_SPINP(j),XS(H)::QAR2(G),XP(j)
      • B(k);SBLOCK::QAR(G)+S(H),DCHECK
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