MESON Chess Problem Database
Problem Display
PID: 214719 (4NN2/5rBQ/3p4/1K1k4/2p2P2/1P1q2p1/2Bpp1P1/3RR3 w - - 0 1)
McKim, JB
Detroit Free Press, 1877
#2
11 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Qf5
- 2.bxc4#
- 1...Qg6
- 2.bxc4#
- 1...Qxh7
- 2.bxc4#
- 1...Qc3
- 2.Be4#
- 2.Qe4#
- 1...Qe3
- 2.bxc4#
- 1...Qf3
- 2.bxc4#
- 1...Rxf4
- 2.Sc7#
- 1...Rc7
- 2.Sxc7#
- 1...Rxf8
- 2.Sc7#
- 1...dxe1Q
- 2.bxc4#
- 1...dxe1S
- 2.bxc4#
- 1...dxe1B
- 2.bxc4#
- 1...dxe1R
- 2.bxc4#
- 1...cxb3+
- 2.Qxd3#
- 1...c3+
- 2.Qxd3#
- 1...Qe4
- Tries
- 1.Bxd3?
- threat
- 2.Bxc4#
- 2.Be4#
- 2.Qe4#
- 2.bxc4#
- 1...Rxf4
- 2.Sc7#
- 1...Rxg7
- 2.Qe4#
- 1...Rxf8
- 2.Sc7#
- 2.Bxc4#
- 2.Qe4#
- 1...cxb3
- 2.Bc4#
- 2.Be4#
- 2.Qe4#
- 1...cxd3
- 2.Qxd3#
- 1...Rf6
- 2.Qe4#
- 1...Rf5
- 2.Sc7#
- 2.Qxf5#
- 2.bxc4#
- 1...Rc7
- 2.Sxc7#
- 2.Be4#
- 2.Qe4#
- 2.Qf5#
- 2.Qh5#
- 1...Re7
- 2.Bxc4#
- 2.bxc4#
- 1...c3
- 2.Bc4#
- 2.Be4#
- 2.Qe4#
- 1...Rb7+!
- threat
- 1.Qf5+?
- 1...Qxf5
- 2.bxc4#
- 1...Rxf5!
- 1...Qxf5
- 1.Bxd3?
- Keys
- 1.Bc3!
- 1...Rb7+
- 2.Qxb7#
- 1...cxb3+
- 2.Qxd3#
- 1...Qxc2
- 2.bxc4#
- 1...Qxh7
- 2.bxc4#
- 1...Qxc3
- 2.Qe4#
- 1...Rxf4
- 2.Sc7#
- 2.Qb7#
- 1...Rxh7
- 2.Sf6#
- 1...Rxf8
- 2.Sc7#
- 1...dxe1Q
- 2.bxc4#
- 1...dxe1S
- 2.bxc4#
- 1...dxe1B
- 2.bxc4#
- 1...dxe1R
- 2.bxc4#
- 1...exd1Q
- 2.Qxf7#
- 1...exd1S
- 2.Qxf7#
- 1...exd1B
- 2.Qxf7#
- 1...exd1R
- 2.Qxf7#
- 1...Rf5
- 2.Qb7#
- 1...Qe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Qf5
- 2.bxc4#
- 1...Qg6
- 2.bxc4#
- 1...Qe3
- 2.bxc4#
- 1...Qf3
- 2.Qxf7#
- 2.bxc4#
- 1...Qd4
- 2.Qxf7#
- 1...Rf6
- 2.Sxf6#
- 2.Sc7#
- 2.Qb7#
- 1...Ra7
- 2.Sf6#
- 1...Rc7
- 2.Sf6#
- 2.Sxc7#
- 1...Rd7
- 2.Sf6#
- 1...Re7
- 2.Sf6#
- 1...Rg7
- 2.Sf6#
- 1...Rb7+
- 1.Bc3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 14
- REMOVED MATES = 4
- Sets
- Q(c);N_GUARD,P_SPINP(a)::P(E),XP(e)
- Q(c);N_GUARD,P_SPINP(a),XQ(I)::P(E),XP(e)
- R(h);N_GUARD,XP(F)::S(J)
- R(h);N_GUARD::S(J),XR(h)
- R(h);N_GUARD,XS(K)::S(J)
- P(a);P_SPINQ(c),XR(B)::P(E),XP(e)
- P(e);CHECK,N_GUARD,XP(E)::QAR2(I),XQ(c)
- P(e);CHECK,N_GUARD::QAR2(I),XQ(c)
- Tries
- Try
- B(C);XQ(c)
- Threat
- DUALS(4)
- Vars
- R(h);N_GUARD,XP(F)::S(J)
- R(h);XB(H)::QAB1(I)
- P(e);OGATE,XB(C)::QAR2(I),XP(e)
- R(h);::QAB1(I)
- Refutation
- R(h);CHECK
- Try
- Q(I);CHECK
- Vars
- Q(c);P_SPINP(a),XQ(I)::P(E),XP(e)
- Refutation
- R(h);XQ(I)
- Try
- Actual
- B(H);
- Vars
- R(h);CHECK,OGATE::QAB(I),XR(h)
- P(e);CHECK,N_GUARD,XP(E)::QAR2(I),XQ(c)
- Q(c);N_GUARD,P_SPINP(a),XB(C)::P(E),XP(e)
- Q(c);N_GUARD,P_SPINP(a),XQ(I)::P(E),XP(e)
- Q(c);N_GUARD,P_SPINP(a),XB(H)::QAB1(I)
- R(h);N_GUARD,XQ(I)::S(J)
- R(h);N_GUARD,XS(K)::S(J)
- P(a);P_SPINQ(c),XR(B)::P(E),XP(e)
- P(b);XR(A)::QAB(I),XR(h)
- R(h);OGATE::QAB(I)
- Q(c);N_GUARD,P_SPINP(a)::P(E),XP(e)
- Q(c);::QAB(I),XR(h)
- R(h);N_GUARD::S(J)
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).