MESON Chess Problem Database

Problem Display
PID: 132226 (4R3/2p5/1N5K/8/p1pkN3/2pb3R/Qb1P3B/4r3 w - - 0 1)

Mosiashvili, Givi

2nd Prize, StrateGems, 2008

4R3/2p5/1N5K/8/p1pkN3/2pb3R/Qb1P3B/4r3

#2

8 + 8

145 StrateGems 2009
56 The Problemist 2010
23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxg1#
    • 1...Re3
      • 2.dxe3#
    • 1...Ba3
      • 2.dxc3#
    • 1...Bb1
      • 2.Qxc4#
    • 1...Bc2
      • 2.Qxc4#
    • 1...Bxe4
      • 2.Qxc4#
  • Tries
    • 1.Bg1+?
      • 1...Re3
        • 2.Bxe3#
        • 2.dxe3#
      • 1...Rxg1!
    • 1.Rxd3+?
      • 1...cxd3
        • 2.Qc4#
        • 2.Qd5#
        • 2.Qxa4#
      • 1...Kxd3!
    • 1.Rh4?
      • threat
        • 2.Be5#
        • 2.Rd8#
      • 1...Rxe4
        • 2.Bg1#
      • 1...Bxe4
        • 2.Qxc4#
      • 1...cxb6
        • 2.Rd8#
      • 1...Bb1
        • 2.Rd8#
        • 2.Qxc4#
      • 1...Bf1
        • 2.Rd8#
      • 1...Bc2
        • 2.Rd8#
        • 2.Qxc4#
      • 1...Be2
        • 2.Rd8#
      • 1...Ba3
        • 2.Be5#
      • 1...cxd2!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qc5#
      • 1...Rxe4
        • 2.Rd8#
      • 1...Bxa3
        • 2.dxc3#
      • 1...Bxe4
        • 2.Be5#
      • 1...cxb6
        • 2.Qd6#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::B(C),XR(a)
    • R(a);OGATE::P(B),XR(a)
    • B(b);N_GUARD::P(B),XP(c)
    • B(d);N_GUARD::QAR1(A),XP(f)
    • B(d);N_GUARD,XS(E)::QAR1(A),XP(f)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • R(a);XB(C)
    • Try
      • R(D);CHECK,XB(d)
      • Refutation
        • K(g);P-FLIGHT,XR(D)
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(E)::B(C)
        • B(d);N_GUARD,P_SPINB(d),XS(E)::QAR1(A),XP(f)
        • P(h);XS(F)::R(H)
        • B(d);::R(H)
        • B(b);::B(C)
      • Refutation
        • P(c);XP(B)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(a);SBLOCK,XS(E)::R(H)
      • B(b);N_GUARD,XQ(A)::P(B),XP(c)
      • B(d);SBLOCK,XS(E)::B(C)
      • P(h);N_GUARD,XS(F)::QAR2(A)
      • P(h);::QAB1(A),XP(h)
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