MESON Chess Problem Database

Problem Display
PID: 24697 (7B/2N1p3/2Qp2P1/1r3kpK/2P3p1/b2N4/r4q2/1B3R2 w - - 0 1)

Markovtsy, Vassyl Yuriovich

The Problemist, 2000

7B/2N1p3/2Qp2P1/1r3kpK/2P3p1/b2N4/r4q2/1B3R2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Sb2#
    • 1...Ra1
      • 2.Rxf2#
    • 1...Bb2
      • 2.Rxf2#
    • 1...d5
      • 2.Qe6#
  • Tries
    • 1.Sxf2+?
      • 1...Rc2
        • 2.Sd1#
        • 2.Sh1#
        • 2.Sh3#
        • 2.Sxg4#
        • 2.Qe4#
      • 1...Rxb1
        • 2.Qe4#
      • 1...Kf4!
    • 1.Sb4+?
      • 1...Rc2
        • 2.Rxf2#
      • 1...Kf4!
    • 1.Sc5+?
      • 1...Rc2
        • 2.Rxf2#
        • 2.Qe4#
      • 1...Rxb1
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qg2?
      • threat
        • 2.Qxg4#
      • 1...Qf4
        • 2.Sb2#
      • 1...g3!
    • 1.Qd7+?
      • 1...e6
        • 2.Qxe6#
      • 1...Ke4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sd4#
      • 1...Kxe6
        • 2.Qc8#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bb2
        • 2.Sdc5#
      • 1...Bc5
        • 2.Qd5#
      • 1...d5
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);::B(A)+S(C)
    • R(a);N_GUARD::R(B),XQ(b)
    • B(c);S_CUTR(a)::R(B),XQ(b)
    • P(h);OGATE::QAB1(F)
  • Tries
    • Try
      • S(C);CHECK,XQ(b)
      • Vars
        • R(e);XB(A)::QAB1(F)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • R(a);P_SPINR(a)::R(B),XQ(b)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • R(e);XB(A)::QAB1(F)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F),XP(d)
      • Vars
        • Q(b);::B(A)+S(C)
      • Refutation
        • P(d);
    • Try
      • Q(F);CHECK
      • Vars
        • P(i);P_SPINP(i)::QAB1(F),XP(i)
      • Refutation
        • K(f);N_SPINQ(b),S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(f);N_SPINQ(b),OGATEB,P_SPINP(h),S_FLIGHT,XS(H)::QAB(F)
      • R(e);N_GUARD::QAR2(F),XR(e)
      • B(c);S_CUTR(a),S_CUTR(e)::B(A)+S(C)
      • B(c);S_CUTR(e)::QAR2(F)
      • P(h);::B(A)+S(C)
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