MESON Chess Problem Database

Problem Display
PID: 169257 (7n/B3R1q1/K2Q1P2/p2NP1p1/r1P1kPB1/1PR1p1p1/3bp3/8 w - - 0 1)

Basisty, Mark Borisovich

Shanshin, Valery Yurevich

Vasilenko, Anatoly Grigorovich

1st Prize, SuperProblem 191. TT, 2017

7n/B3R1q1/K2Q1P2/p2NP1p1/r1P1kPB1/1PR1p1p1/3bp3/8

#2

12 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.exf6#
    • 1...Be1
      • 2.Rxe3#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Qd4#
      • 1...Qxf6
        • 2.exf6#
      • 1...Rxc4
        • 2.Rxc4#
      • 1...Bxc3!
    • 1.Rd3?
      • threat
        • 2.Rd4#
      • 1...Kxd3
        • 2.Bf5#
      • 1...Bc3
        • 2.Rxe3#
      • 1...Rxc4!
    • 1.Qb6?
      • threat
        • 2.Qd4#
      • 1...Qxf6
        • 2.exf6#
      • 1...Bxc3
        • 2.Qxe3#
      • 1...Rxc4!
    • 1.e6?
      • threat
        • 2.Qe5#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Bxc3
        • 2.Sxc3#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Sf7
        • 2.exf7#
      • 1...Sg6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qd4#
      • 1...Qxf6+
        • 2.exf6#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Bxc3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(i);OGATE,P_PINQ(I),XP(J)::R(L)+P(G),XQ(i)
    • B(a);N_GUARD::R1(B),XP(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(I)
      • Vars
        • K(f);P-FLIGHT,XP(D)::QAR2(I)
        • Q(i);OGATE,P_PINQ(I),XP(J)::R(L)+P(G),XQ(i)
        • R(e);OGATE,XP(C)::R(B),XR(e)
      • Refutation
        • B(a);XR(B)
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • K(f);S_FLIGHT,XR(B)::B(E)
        • B(a);N_GUARD::R1(B),XP(c)
      • Refutation
        • R(e);XP(C)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • Q(i);OGATE,P_PINQ(I),XP(J)::R(L)+P(G),XQ(i)
        • B(a);N_GUARD,XR(B)::QAR1(I),XP(c)
      • Refutation
        • R(e);XP(C)
    • Try
      • P(G);
      • Threat
        • QAR1(I)
      • Vars
        • Q(i);XP(J)::S(F),XQ(i)
        • B(a);XR(B)::S(F),XB(a)
        • P(h);OGATE,XP(D)::QAR1(I),XP(h)
        • S(j);OGATE::R(L)+P(G),XS(j)
      • Refutation
        • S(j);
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • Q(i);CHECK,OGATE,XP(J)::R(L)+P(G),XQ(i)
      • R(e);OGATE,XP(C)::QAR2(I),XR(e)
      • B(a);N_GUARD,XR(B)::QAR1(I),XP(c)
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