MESON Chess Problem Database

Problem Display
PID: 199911 (4n3/4p3/1BpPrp1N/4kBpb/1pP1pp2/b7/4N2K/3RQ3 w - - 0 1)

Basisty, Mark Borisovich

Vasilenko, Anatoly Grigorovich

3rd Prize, Zadachi i Etyudi, 2017

4n3/4p3/1BpPrp1N/4kBpb/1pP1pp2/b7/4N2K/3RQ3

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd6
      • 2.Bd4#
    • 1...b3
      • 2.Qc3#
    • 1...f3
      • 2.Qg3#
    • 1...c5
      • 2.Rd5#
    • 1...exd6
      • 2.Bd4#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qxe4#
      • 1...fxg3+
        • 2.Qxg3#
      • 1...Bxd1
        • 2.Sf7#
      • 1...Sxd6
        • 2.Bd4#
      • 1...Be2
        • 2.Sf7#
      • 1...Bf3
        • 2.Sf7#
      • 1...e3!
    • 1.Sxf4?
      • threat
        • 2.Qxe4#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Sxd6
        • 2.Sd3#
      • 1...Be2
        • 2.Sg6#
      • 1...Bf3
        • 2.Sg6#
      • 1...e3
        • 2.Qxe3#
      • 1...Bxd1!
    • 1.Qd2?
      • threat
        • 2.Qd4#
      • 1...Bb2
        • 2.Qxb2#
      • 1...c5
        • 2.Qd5#
      • 1...Rxd6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sxc6#
      • 1...Kxd6
        • 2.Sf3#
      • 1...Rxd6
        • 2.Qxe4#
      • 1...Bxd1
        • 2.Sf7#
      • 1...f3
        • 2.Qg3#
      • 1...c5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(l);SBLOCK,XP(H)::B(G)
    • P(b);N_GUARD::QAB(B)
    • P(d);OGATEB::QAB(B)
    • P(h);N_GUARD::R1(A)
    • P(k);SBLOCK,XP(H)::B(G)
  • Tries
    • Try
      • S(C);P_PINP(c)
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • P(d);CHECK,OGATE,XS(C)::QAB(B),XP(d)
        • B(g);N_GUARD,XR(A)::S(I)
        • S(l);SBLOCK,XP(H)::B(G)
        • B(g);N_GUARD,N_SPINP(c)::S(I)
        • B(g);N_GUARD::S(I)
      • Refutation
        • P(c);
    • Try
      • S(C);P_PINP(c),XP(d)
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • K(e);N_SPINP(c),OGATEB,S_FLIGHT,XS(C)::QAB1(B)
        • S(l);SBLOCK,XP(H)::S(C)
        • B(g);N_GUARD,N_SPINP(c)::S(C)
        • B(g);N_GUARD::S(C)
        • P(c);OGATEB::QAR2(B),XP(c)
      • Refutation
        • B(g);XR(A)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • B(a);N_GUARD::QAB(B),XB(a)
        • P(h);N_GUARD::QAR1(B)
      • Refutation
        • R(i);XP(H)
  • Actual
    • S(C);P_PINP(c)
    • Threat
      • S(C),XP(h)
    • Vars
      • K(e);N_SPINP(c),S_FLIGHT,XP(H)::R(A)+S(C)
      • R(i);SBLOCK,XP(H)::QAR1(B),XP(c)
      • B(g);N_GUARD,XR(A)::S(I)
      • P(d);OGATEB::QAB(B)
      • P(h);::S(C)
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