MESON Chess Problem Database

Problem Display
PID: 247003 (1BR4q/1P1rpb2/ppB1P3/2k2NR1/3N3p/1K1p3Q/8/8 w - - 0 1)

Vakhlakov, Yuri Nikolaevich

Uralski Problemist, 1997

1BR4q/1P1rpb2/ppB1P3/2k2NR1/3N3p/1K1p3Q/8/8

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Be8#
    • 1...Bxe6+
      • 2.Sxe6#
    • 1...d2
      • 2.Qc3#
    • 1...b5
      • 2.Ba7#
  • Tries
    • 1.Sd6+?
      • 1...Kxd4
        • 2.Rd5#
      • 1...Qe5!
    • 1.Sg7+?
      • 1...Rd5
        • 2.Rxd5#
      • 1...Kxd4!
    • 1.Bh1+?
      • 1...Rc7
        • 2.Rxc7#
      • 1...Qxc8!
    • 1.Bg2+?
      • 1...Rc7
        • 2.Rxc7#
      • 1...Qxc8!
    • 1.Bf3+?
      • 1...Rc7
        • 2.Rxc7#
      • 1...Qxc8!
    • 1.Be4+?
      • 1...Rc7
        • 2.Rxc7#
      • 1...Qxc8!
    • 1.Bxd7+?
      • 1...Kd5
        • 2.Qg2#
        • 2.Qh1#
        • 2.Qf3#
      • 1...Qxc8!
    • 1.Qh1?
      • threat
        • 2.Qc1#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Qxd4
        • 2.Bxd7#
      • 1...Rxd4
        • 2.Be8#
      • 1...b5
        • 2.Ba7#
      • 1...d2!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qc1#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Qxd4
        • 2.Sd6#
      • 1...Rxd4
        • 2.Sg7#
      • 1...b5
        • 2.Ba7#
      • 1...d2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(f);N_PINP(G),OGATE,SBLOCK::R(J)+B(F)
    • B(h);CHECK,XP(G)::S(C),XB(h)
    • P(a);OGATE::QAR2(B)
    • P(e);OGATEB::B(I)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(C)::R1(E)
      • Refutation
        • Q(i);P_SPINQ(i)
    • Try
      • S(D);CHECK
      • Vars
        • R(f);N_GUARD,N_PINP(G),P_SPINR(f)::R1(E),XR(f)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • B(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::R(J),XR(f)
      • Refutation
        • Q(i);XR(J)
    • Try
      • B(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::R(J),XR(f)
      • Refutation
        • Q(i);XR(J)
    • Try
      • B(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::R(J),XR(f)
      • Refutation
        • Q(i);XR(J)
    • Try
      • B(F);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::R(J),XR(f)
      • Refutation
        • Q(i);XR(J)
    • Try
      • B(F);CHECK,XR(f)
      • Refutation
        • Q(i);XR(J)
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • B(h);CHECK,XP(G)::S(C),XB(h)
        • Q(i);N_GUARD,XS(C)::R(J)+B(F),XR(f)
        • R(f);OGATE,XS(C)::R(J)+B(F)
        • P(e);OGATEB::B(I)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • B(h);CHECK,XP(G)::QAB(B)+S(C),DCHECK,XB(h)
      • Q(i);N_GUARD,P_SPINQ(i),XS(C)::R(E)+S(D)
      • R(f);N_GUARD,P_SPINR(f),XS(C)::R(E)+S(D)
      • P(e);OGATEB::B(I)
      • P(a);OGATE::QAR2(B)
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