MESON Chess Problem Database

Problem Display
PID: 8217 (1br2q2/3P4/4N1n1/1BQ5/KpPPPp2/p2k1N2/2R1RP2/3r4 w - - 0 1)

Vukcevich, Milan Radoje

3rd Prize, US Problem Bulletin, 1995

1br2q2/3P4/4N1n1/1BQ5/KpPPPp2/p2k1N2/2R1RP2/3r4

#2

12 + 9

5398 My Chess Compositions 2003
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sxe1#
  • Tries
    • 1.Red2+?
      • 1...Kxe4
        • 2.Sfg5#
        • 2.Seg5#
        • 2.Qd5#
      • 1...Rxd2!
    • 1.Qxb4?
      • threat
        • 2.Qc3#
        • 2.Qb3#
        • 2.c5#
      • 1...Rxc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...Rd2
        • 2.Rcxd2#
        • 2.Qxd2#
      • 1...Qc5
        • 2.Qc3#
        • 2.Qb3#
      • 1...Rb1
        • 2.Rcd2#
        • 2.Qd2#
        • 2.Qc3#
        • 2.c5#
      • 1...Rc5
        • 2.Qxa3#
        • 2.Qc3#
        • 2.Qb3#
      • 1...Se5
        • 2.Qc3#
        • 2.Qb3#
      • 1...Qxb4+!
    • 1.Qd6?
      • threat
        • 2.c5#
      • 1...Rxc4
        • 2.Sc5#
        • 2.Bxc4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Se5
        • 2.Sxe5#
      • 1...Rd2!
    • 1.Qxf8?
      • threat
        • 2.c5#
      • 1...Rxc4
        • 2.Sc5#
        • 2.Bxc4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Se5
        • 2.Sxf4#
      • 1...Rd2!
    • 1.Qf5?
      • threat
        • 2.c5#
      • 1...Rxc4
        • 2.Bxc4#
      • 1...Rd2
        • 2.Rexd2#
      • 1...Qc5
        • 2.e5#
      • 1...Se5
        • 2.Sxf4#
      • 1...Rc5!
    • 1.Qc6?
      • threat
        • 2.c5#
      • 1...Rd2
        • 2.Rexd2#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Se5!
    • 1.Qc7?
      • threat
        • 2.c5#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Se5
        • 2.Sxe5#
      • 1...Rd2!
  • Keys
    • 1.Qd5!
      • threat
        • 2.c5#
      • 1...Rxc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...Rd2
        • 2.Rexd2#
      • 1...Qc5
        • 2.dxc5#
      • 1...Rc5
        • 2.dxc5#
      • 1...Se5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::S(D),XR(a)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • R(a);XR(B)
    • Try
      • Q(J);XP(d)
      • Threat
        • DUALS(3)
      • Refutation
        • Q(i);CHECK,XQ(J)
    • Try
      • Q(J);
      • Threat
        • B(I)+P(F)
      • Vars
        • R(h);N_GUARD::S(K),XR(h)
        • S(f);N_GUARD::S(D),XS(f)
      • Refutation
        • R(a);
    • Try
      • Q(J);XQ(i)
      • Threat
        • B(I)+P(F)
      • Vars
        • R(h);N_GUARD::S(K),XR(h)
        • S(f);N_GUARD,S_CUTB(g)::S(K),XP(e)
      • Refutation
        • R(a);
    • Try
      • Q(J);
      • Threat
        • B(I)+P(F)
      • Vars
        • R(h);OGATE,P_SPINR(h),XP(F)::B(I),XR(h)
        • R(a);N_GUARD::R1(B),XR(a)
        • Q(i);N_GUARD::QAB(J)+P(H)
        • S(f);N_GUARD,S_CUTB(g)::S(K),XP(e)
      • Refutation
        • R(h);
    • Try
      • Q(J);
      • Threat
        • B(I)+P(F)
      • Vars
        • R(a);N_GUARD::R1(B),XR(a)
        • Q(i);N_GUARD::S(K),XQ(i)
      • Refutation
        • S(f);
    • Try
      • Q(J);
      • Threat
        • B(I)+P(F)
      • Vars
        • Q(i);N_GUARD::S(K),XQ(i)
        • S(f);N_GUARD::S(D),XS(f)
      • Refutation
        • R(a);
  • Actual
    • Q(J);
    • Threat
      • B(I)+P(F)
    • Vars
      • R(a);N_GUARD::R1(B),XR(a)
      • Q(i);OGATE::QAR(J)+P(G),XQ(i)
      • R(h);OGATE::QAR(J)+P(G),XR(h)
      • S(f);OGATE::QAR(J)+P(G),XS(f)
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