MESON Chess Problem Database

Problem Display
PID: 89289 (6B1/q7/1Qrpn3/1N1b3R/1b1Pk3/1nrR4/4P2B/5N1K w - - 0 1)

Velimirovic, Milan

The Problemist, 1977

6B1/q7/1Qrpn3/1N1b3R/1b1Pk3/1nrR4/4P2B/5N1K

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb6
      • 2.Bh7#
    • 1...Qb8
      • 2.Bh7#
    • 1...Qa1
      • 2.Bh7#
    • 1...Qa2
      • 2.Bh7#
    • 1...Qa3
      • 2.Bh7#
    • 1...Qa4
      • 2.Bh7#
    • 1...Qa5
      • 2.Bh7#
    • 1...Qa6
      • 2.Bh7#
    • 1...Qh7
      • 2.Bxh7#
    • 1...Qa8
      • 2.Bh7#
    • 1...Rc1
      • 2.Re3#
    • 1...Rc2
      • 2.Re3#
    • 1...R3c4
      • 2.Re3#
    • 1...R3c5
      • 2.Re3#
    • 1...R6c5
      • 2.Sxd6#
    • 1...Bc5
      • 2.Sxc3#
    • 1...Sa1
      • 2.Sd2#
    • 1...Sc1
      • 2.Sd2#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sbxd4
      • 2.Sd2#
    • 1...Sa5
      • 2.Sd2#
    • 1...Sbc5
      • 2.Sd2#
    • 1...Sexd4
      • 2.Bxd5#
    • 1...Sf4
      • 2.Sg3#
    • 1...Sec5
      • 2.Bxd5#
    • 1...Sc7
      • 2.Bh7#
    • 1...Sg7
      • 2.Bxd5#
    • 1...Sd8
      • 2.Bxd5#
    • 1...Sf8
      • 2.Bxd5#
  • Tries
    • 1.Sxc3+?
      • 1...Bxc3
        • 2.Re3#
      • 1...Rxc3!
    • 1.Sxd6+?
      • 1...Rxd6
        • 2.Re5#
      • 1...Bxd6!
    • 1.Bf7?
      • threat
        • 2.Bg6#
      • 1...Sbxd4
        • 2.Sd2#
      • 1...Sexd4
        • 2.Bxd5#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sg7
        • 2.Bxd5#
      • 1...Sf8
        • 2.Bxd5#
      • 1...Qxf7!
    • 1.Rh4+?
      • 1...Sf4
        • 2.Sg3#
        • 2.Rxf4#
      • 1...Kf5+!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxd5#
      • 1...Qxc5
        • 2.Bh7#
      • 1...R3xc5
        • 2.Re3#
      • 1...R6xc5
        • 2.Sxd6#
      • 1...Bxc5
        • 2.Sxc3#
      • 1...Sbxc5
        • 2.Sd2#
      • 1...Sexc5
        • 2.Bxd5#
      • 1...dxc5
        • 2.Re5#
      • 1...Bc4
        • 2.Qf5#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sc7
        • 2.Bh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 22
  • Sets
    • Q(i);N_GUARD,XQ(I)::B(J)
    • Q(i);N_GUARD::B(J)
    • Q(i);N_GUARD,P_PINS(A)::B(J)
    • Q(i);N_GUARD::B(J),XQ(i)
    • R(b);N_GUARD,P_PINS(A)::R1(E)
    • R(b);N_GUARD::R1(E)
    • R(f);N_GUARD,S_CUTB(c)::S(G),XP(g)
    • B(c);N_GUARD,S_CUTR(f)::S(G),XR(b)
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • S(a);N_GUARD,XP(F)::S(A)
    • S(h);OGATE,XP(F)::B(J),XB(e)
    • S(h);SBLOCK::S(A)
    • S(h);OGATE::B(J),XB(e)
    • S(h);S_CUTQ(i)::B(J)
  • Tries
    • Try
      • S(G);CHECK,XR(b)
      • Vars
        • B(c);XS(G)::R1(E)
      • Refutation
        • R(f);XS(G)
    • Try
      • S(G);CHECK,XP(g)
      • Vars
        • R(f);XS(G)::R1(H)
      • Refutation
        • B(c);XS(G)
    • Try
      • B(J);
      • Threat
        • B(J)
      • Vars
        • S(a);N_GUARD,XP(F)::S(A)
        • S(h);OGATE,XP(F)::B(J),XB(e)
        • S(h);SBLOCK::S(A)
        • S(h);OGATE::B(J),XB(e)
      • Refutation
        • Q(i);XB(J)
    • Try
      • R(H);CHECK
      • Refutation
        • K(d);CHECK,S_FLIGHT
  • Actual
    • Q(I);
    • Threat
      • QAB1(I),XB(e)
    • Vars
      • Q(i);N_GUARD,XQ(I)::B(J)
      • R(b);N_GUARD,XQ(I)::R1(E)
      • R(f);N_GUARD,XQ(I)::S(G),XP(g)
      • B(c);N_GUARD,XQ(I)::S(G),XR(b)
      • S(a);N_GUARD,XQ(I)::S(A)
      • S(h);OGATE,XQ(I)::B(J),XB(e)
      • P(g);N_GUARD,XQ(I)::R1(H)
      • B(e);OGATE::QAB1(I)
      • S(h);SBLOCK::S(A)
      • S(h);S_CUTQ(i)::B(J)
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