MESON Chess Problem Database
Problem Display
PID: 109739 (2N1q1B1/B1b5/3Qn3/r2n1p2/P1kp2Rr/1R5p/P2Pb2K/4N3 w - - 0 1)
Youngs, Joe Casey
Northwest Chess, 1976
#2
11 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bd1
- 2.d3#
- 1...Bf3
- 2.d3#
- 1...Bxg4
- 2.d3#
- 1...Bxd6+
- 2.Sxd6#
- 1...Sc3
- 2.Rxc3#
- 2.Rb4#
- 1...Se3
- 2.Rc3#
- 2.Rb4#
- 1...Sb4
- 2.Rc3#
- 2.Rxb4#
- 1...Sdf4
- 2.Rb4#
- 2.Qxd4#
- 1...Sb6
- 2.Rc3#
- 2.Rb4#
- 1...Sf6
- 2.Rc3#
- 2.Rb4#
- 1...Se7
- 2.Rc3#
- 2.Rb4#
- 1...Sef4
- 2.Rb4#
- 2.Qb4#
- 1...Sc5
- 2.Bxd5#
- 1...Sg5
- 2.Rc3#
- 2.Rb4#
- 1...Sg7
- 2.Rc3#
- 2.Rb4#
- 1...Sd8
- 2.Rc3#
- 2.Rb4#
- 1...Sf8
- 2.Rc3#
- 2.Rb4#
- 1...Bd1
- Tries
- 1.Sd3?
- threat
- 2.Sb2#
- 2.Se5#
- 1...Bxd6+
- 2.Sxd6#
- 1...Sc3
- 2.Sb2#
- 2.Rxc3#
- 1...Se3
- 2.Sb2#
- 2.Rc3#
- 1...Sb4
- 2.Sb2#
- 2.Rc3#
- 1...Sdf4
- 2.Sb2#
- 2.Qxd4#
- 1...Sb6
- 2.Sb2#
- 2.Rc3#
- 1...Sf6
- 2.Sb2#
- 2.Rc3#
- 1...Se7
- 2.Sb2#
- 2.Rc3#
- 1...Sef4
- 2.Sb2#
- 2.Qb4#
- 1...Sc5
- 2.Sb2#
- 2.Bxd5#
- 2.Rc3#
- 1...Sg5
- 2.Sb2#
- 2.Rc3#
- 1...Sg7
- 2.Sb2#
- 2.Rc3#
- 1...Sd8
- 2.Sb2#
- 2.Rc3#
- 1...Sf8
- 2.Sb2#
- 2.Rc3#
- 1...Bxd3!
- threat
- 1.Sb6+?
- 1...Sxb6
- 2.Rc3#
- 2.Rb4#
- 1...Bxb6!
- 1...Sxb6
- 1.Rxd4+?
- 1...Sxd4
- 2.Rc3#
- 2.Rb4#
- 1...Rxd4!
- 1...Sxd4
- 1.Qxc7+?
- 1...Qc6
- 2.Sd6#
- 1...Rc5
- 2.Sd6#
- 1...Sc5
- 2.Sb6#
- 2.Sd6#
- 1...Sexc7
- 2.Sd6#
- 1...Sdxc7!
- 1...Qc6
- 1.Sd3?
- Keys
- 1.Sf3!
- threat
- 2.Se5#
- 1...Bxd6+
- 2.Sxd6#
- 1...Bxf3
- 2.d3#
- 1...Sc3
- 2.Rxc3#
- 1...Se3
- 2.Rc3#
- 1...Sb4
- 2.Rc3#
- 1...Sdf4
- 2.Qxd4#
- 1...Sb6
- 2.Rc3#
- 1...Sf6
- 2.Rc3#
- 1...Se7
- 2.Rc3#
- 1...Sef4
- 2.Qb4#
- 1...Sc5
- 2.Bxd5#
- 1...Sg5
- 2.Rc3#
- 1...Sg7
- 2.Rc3#
- 1...Sd8
- 2.Rc3#
- 1...Sf8
- 2.Rc3#
- threat
- 1.Sf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 2
- Sets
- B(a);N_GUARD::P(C)
- B(a);N_GUARD,N_SPINP(d),XR(G)::P(C)
- B(j);CHECK,XQ(H)::S(J),XB(j)
- S(i);OGATE,P_SPINS(g)::B(K),XS(g)
- Tries
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- B(j);CHECK,XQ(H)::S(J),XB(j)
- Refutation
- B(a);XS(A)
- Try
- S(J);CHECK
- Refutation
- B(j);N_PINQ(H),XS(J)
- Try
- R(G);CHECK,XP(d)
- Refutation
- R(e);XR(G)
- Try
- Q(H);CHECK,N_SPINQ(H),XB(j)
- Vars
- Q(k);P_SPINQ(k)::S(J)
- R(f);P_SPINR(f)::S(J)
- S(i);P_SPINS(g),XQ(H)::S(J)
- Refutation
- S(g);P_SPINS(i),XQ(H)
- Try
- Actual
- S(A);
- Threat
- S(A)
- Vars
- B(j);CHECK,XQ(H)::S(J),XB(j)
- B(a);N_GUARD,XS(A)::P(C)
- S(g);N_GUARD,P_SPINS(i)::R1(E),XS(g)
- S(g);N_GUARD,P_SPINS(i)::R1(E)
- S(g);N_PINQ(H),N_SPINP(d),P_SPINS(i)::QAR1(H),XP(d)
- S(i);N_PINQ(H),N_SPINP(d),P_SPINS(g)::QAR1(H)
- S(i);OGATE,P_SPINS(g)::B(K),XS(g)
- S(i);P_SPINS(g)::R1(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).