MESON Chess Problem Database

Problem Display
PID: 87702 (7b/2R1N2p/1n1B2p1/1p1P1pP1/3k2P1/1P3KR1/2pPpP2/q1n1N2Q w - - 0 1)

Oltean, Gligor

2nd HM., Buletin Problemistic, 1998-1999

7b/2R1N2p/1n1B2p1/1p1P1pP1/3k2P1/1P3KR1/2pPpP2/q1n1N2Q

#2

13 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3+
      • 2.dxc3#
    • 1...Be5
      • 2.Bc5#
    • 1...Sd3
      • 2.Sxc2#
    • 1...Sxd5
      • 2.Sc6#
    • 1...fxg4+
      • 2.Rxg4#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Sc6#
      • 1...Qc3+
        • 2.dxc3#
      • 1...fxg4+
        • 2.Rxg4#
      • 1...Qa8!
    • 1.Qh4?
      • threat
        • 2.gxf5#
      • 1...Qc3+
        • 2.dxc3#
      • 1...fxg4+
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Sxd5
        • 2.Sc6#
      • 1...Be5
        • 2.Bc5#
      • 1...Sd3
        • 2.Sxc2#
      • 1...f4!
    • 1.gxf5?
      • threat
        • 2.Rg4#
        • 2.Qh4#
      • 1...Qc3+
        • 2.dxc3#
      • 1...Sxd5
        • 2.Sc6#
      • 1...Be5
        • 2.Bc5#
      • 1...Sd3
        • 2.Sxc2#
      • 1...h5
        • 2.Qh4#
      • 1...gxf5!
  • Keys
    • 1.Kf4!
      • threat
        • 2.Sxc2#
        • 2.Sc6#
        • 2.Bc5#
      • 1...Be5+
        • 2.Bxe5#
      • 1...Sd3+
        • 2.Rxd3#
      • 1...Sxd5+
        • 2.Qxd5#
      • 1...Sxb3
        • 2.Sxc2#
        • 2.Rd3#
      • 1...Qb2
        • 2.Sc6#
        • 2.Bc5#
      • 1...Qc3
        • 2.dxc3#
      • 1...Qb1
        • 2.Sc6#
        • 2.Bc5#
      • 1...Qa2
        • 2.Sc6#
        • 2.Bc5#
      • 1...Qa3
        • 2.Sxc2#
        • 2.Sc6#
      • 1...Qa8
        • 2.Sxc2#
        • 2.Bc5#
      • 1...Sa4
        • 2.Sxc2#
        • 2.Sc6#
      • 1...Sd7
        • 2.Sxc2#
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,OGATE::P(C),XQ(a)
    • B(k);SBLOCK::B(K)
    • S(b);SBLOCK::S(A),XP(c)
    • S(h);SBLOCK,XP(I)::S(M)
    • P(g);CHECK,OGATE,XP(H)::R(G),XP(g)
  • Tries
    • Try
      • R(L);
      • Threat
        • S(M)
      • Vars
        • Q(a);CHECK,OGATE::P(C),XQ(a)
        • P(g);CHECK,OGATE,XP(H)::R(G),XP(g)
      • Refutation
        • Q(a);P_PINP(I)
    • Try
      • Q(B);
      • Threat
        • QAR(B)+P(H),XP(g)
      • Vars
        • Q(a);CHECK,OGATE::P(C),XQ(a)
        • S(h);SBLOCK,XP(I)::S(M)
        • B(k);SBLOCK::B(K)
        • S(b);SBLOCK::S(A),XP(c)
      • Refutation
        • P(g);
    • Try
      • P(H);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,OGATE::P(C),XQ(a)
        • S(h);SBLOCK,XP(I)::S(M)
        • B(k);SBLOCK::B(K)
        • S(b);SBLOCK::S(A),XP(c)
        • P(j);::QAR(B)
      • Refutation
        • P(i);XP(H)
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • DUALS(3)
    • Vars
      • B(k);CHECK,N_GUARD::B(K),XB(k)
      • S(b);CHECK,N_GUARD::R1(G),XS(b)
      • S(h);CHECK,OGATE,XP(I)::QAR1(B),XS(h)
      • Q(a);OGATE::P(C),XQ(a)
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