MESON Chess Problem Database

Problem Display
PID: 265149 (1b2r3/pQ3R1n/B2pp2R/3N4/4k2r/4P1p1/nB4Pq/Kb1N4 w - - 0 1)

Basisty, Mark Borisovich

1st HM., 05. World Cup, 2017

1b2r3/pQ3R1n/B2pp2R/3N4/4k2r/4P1p1/nB4Pq/Kb1N4

#2

10 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Rxh4#
    • 1...Qxg2
      • 2.Rxh4#
    • 1...Rh3
      • 2.Rf4#
    • 1...Rf4
      • 2.Rxf4#
    • 1...Rh5
      • 2.Rf4#
    • 1...Rxh6
      • 2.Rf4#
    • 1...Rc8
      • 2.Rxe6#
    • 1...Rd8
      • 2.Rxe6#
    • 1...Rf8
      • 2.Rxe6#
    • 1...Rg8
      • 2.Rxe6#
    • 1...Rh8
      • 2.Rxe6#
    • 1...e5
      • 2.S5c3#
  • Tries
    • 1.Bd4?
      • threat
        • 2.S5c3#
      • 1...exd5
        • 2.Qxb1#
      • 1...Sc3
        • 2.S1xc3#
        • 2.S5xc3#
      • 1...Sf6!
    • 1.Bg7?
      • threat
        • 2.S5c3#
      • 1...exd5
        • 2.Qxb1#
      • 1...Sc3
        • 2.S1xc3#
        • 2.S5xc3#
      • 1...Sf6!
    • 1.Bh8?
      • threat
        • 2.S5c3#
      • 1...Rxh8
        • 2.Rxe6#
      • 1...exd5
        • 2.Qxb1#
      • 1...Sc3
        • 2.S1xc3#
        • 2.S5xc3#
      • 1...Sf6!
    • 1.Rh5?
      • threat
        • 2.S5c3#
        • 2.Sf6#
      • 1...Rxh5
        • 2.Rf4#
      • 1...exd5
        • 2.Qxd5#
      • 1...Sc3
        • 2.S1xc3#
        • 2.S5xc3#
        • 2.Sf6#
        • 2.Qb4#
      • 1...Sf6
        • 2.S5c3#
        • 2.Sxf6#
      • 1...Sg5!
    • 1.Rf1?
      • threat
        • 2.Sf6#
      • 1...exd5
        • 2.Qxh7#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sc3!
    • 1.Rf3?
      • threat
        • 2.Sf6#
      • 1...exd5
        • 2.Qxh7#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sc3!
    • 1.Qb4+?
      • 1...Kxd5
        • 2.Bb7#
      • 1...Sxb4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qc4#
      • 1...exd5
        • 2.Qxe8#
      • 1...Sc3
        • 2.S5xc3#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Rc8
        • 2.Rxe6#
      • 1...Bd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD::R(H),XR(f)
    • Q(c);N_GUARD,XP(D)::R(H),XR(f)
    • R(f);N_GUARD::R1(J)
    • R(f);N_GUARD::R1(J),XR(f)
    • R(f);N_GUARD,XR(H)::R1(J)
    • R(l);N_GUARD::R(H),XP(h)
    • P(h);SBLOCK::QAB(I)+S(F),DCHECK
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB(I)+S(F),DCHECK
      • Vars
        • P(h);P_SPINP(h),SBLOCK,XS(F)::QAB(I),XB(a)
      • Refutation
        • S(j);
    • Try
      • B(C);
      • Threat
        • QAB(I)+S(F),DCHECK
      • Vars
        • P(h);P_SPINP(h),SBLOCK,XS(F)::QAB(I),XB(a)
      • Refutation
        • S(j);
    • Try
      • B(C);
      • Threat
        • QAB(I)+S(F),DCHECK
      • Vars
        • R(l);N_GUARD,XB(C)::R(H),XP(h)
        • P(h);P_SPINP(h),SBLOCK,XS(F)::QAB(I),XB(a)
      • Refutation
        • S(j);
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);N_GUARD,XR(H)::R1(J)
        • P(h);OGATE,P_SPINP(h),XS(F)::QAB1(I),XP(h)
      • Refutation
        • S(j);
    • Try
      • R(J);
      • Threat
        • QAB(I)+S(F),DCHECK
      • Vars
        • P(h);P_SPINP(h),SBLOCK,XS(F)::QAB(I),XS(j)
        • R(f);N_GUARD::R1(J),XR(f)
        • S(j);::QAB(I)+S(F),DCHECK,XS(j)
      • Refutation
        • S(b);
    • Try
      • R(J);
      • Threat
        • QAB(I)+S(F),DCHECK
      • Vars
        • P(h);P_SPINP(h),SBLOCK,XS(F)::QAB(I),XS(j)
        • R(f);N_GUARD::R1(J),XR(f)
        • S(j);::QAB(I)+S(F),DCHECK,XS(j)
      • Refutation
        • S(b);
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);N_GUARD,S_CUTS(b),S_FLIGHT,XS(F)::B(G)
      • Refutation
        • S(b);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I)
    • Vars
      • P(h);OGATEB,SBLOCK,XS(F)::QAR(I),XR(l)
      • S(b);N_GUARD::S(F),XS(b)
      • S(j);N_GUARD::S(F),XS(j)
      • R(l);N_GUARD::R(H),XP(h)
      • B(a);N_GUARD::QAB1(I),XB(a)
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