MESON Chess Problem Database
Problem Display
PID: 151859 (4b3/8/8/4n1B1/r2pKR2/4N1P1/N1pkB1p1/1R3Q1q w - - 0 1)
Cheron, Andre
Journal de Geneve, 1972
#2
9 + 8
| 102 | Probleemblad | 1979 |
| 56 | The Problemist | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Qe1#
- 1...Qh3
- 2.Qe1#
- 1...Qh4
- 2.Qe1#
- 1...Qh5
- 2.Qe1#
- 1...Qh6
- 2.Qe1#
- 1...Qh8
- 2.Qe1#
- 1...c1S
- 2.Rb2#
- 1...Qh2
- Tries
- 1.Sc4+?
- 1...Rxc4
- 2.Rf2#
- 2.Rf3#
- 2.Rg4#
- 2.Rh4#
- 2.Rf5#
- 2.Rf6#
- 2.Rf7#
- 2.Rf8#
- 1...Sxc4!
- 1...Rxc4
- 1.Qc1+?
- 1...Kxe2
- 2.Qxc2#
- 1...Qxc1!
- 1...Kxe2
- 1.Sc4+?
- Keys
- 1.Rf2!
- threat
- 2.Sd1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...Qh4+
- 2.Bg4#
- 1...Qh7+
- 2.Sf5#
- 1...Bc6+
- 2.Sd5#
- 1...Bg6+
- 2.Sf5#
- 1...cxb1Q+
- 2.Bd3#
- 1...cxb1B+
- 2.Bd3#
- 1...gxf1Q+
- 2.Sg2#
- 1...gxf1S+
- 2.Bf3#
- 1...gxf1B+
- 2.Sg2#
- 1...gxf1R+
- 2.Sg2#
- 1...g1Q+
- 2.Sg2#
- 1...g1S+
- 2.Sg2#
- 1...g1B+
- 2.Sg2#
- 1...g1R+
- 2.Sg2#
- 2.Bf3#
- 1...dxe3+
- 2.Bc4#
- 1...d3+
- 2.Sc4#
- 1...Qxf1
- 2.Sxf1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Bxf1#
- 1...Rxa2
- 2.Sd1#
- 2.Sd5#
- 1...cxb1S
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...cxb1R
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...c1Q
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...c1S
- 2.Rb2#
- 1...c1B
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...c1R
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...Qg1
- 2.Sd1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 1...Qh5
- 2.Sc4#
- 2.Bf3#
- 2.Bg4#
- 2.Bxh5#
- 2.Qc1#
- 2.Qe1#
- 1...Qh6
- 2.Sc4#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 2.Qc1#
- 2.Qe1#
- 1...Ra3
- 2.Sc4#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...Rc4
- 2.Sd1#
- 2.Sxg2#
- 2.Sxc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bxc4#
- 2.Bg4#
- 2.Bh5#
- 1...Ra6
- 2.Sd1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Bxa6#
- 1...Bb5
- 2.Sd1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Bd3#
- 2.Bc4#
- 2.Bxb5#
- 1...Bh5
- 2.Sd1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Bf3#
- 2.Bg4#
- 2.Bxh5#
- 1...Sd3
- 2.Sc4#
- 2.Bxd3#
- 1...Sf3
- 2.Sc4#
- 2.Bd1#
- 2.Bd3#
- 2.Bxf3#
- 2.Bc4#
- 2.Bb5#
- 2.Ba6#
- 1...Sc4
- 2.Sxc4#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bxc4#
- 2.Bg4#
- 2.Bh5#
- 1...Sg4
- 2.Sc4#
- 2.Sxg4#
- 2.Bxg4#
- 1...Sg6
- 2.Sc4#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- 1...Sf7
- 2.Sc4#
- 2.Bd1#
- 2.Bd3#
- 2.Bf3#
- 2.Bc4#
- 2.Bg4#
- 2.Bb5#
- 2.Bh5#
- 2.Ba6#
- threat
- 1.Rf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 14
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD::QAB1(B)
- Q(a);N_GUARD,P_PINR(H)::QAB1(B)
- P(b);OGATEB::R(A)
- Tries
- Try
- S(E);CHECK
- Refutation
- S(g);XS(E)
- Try
- Q(B);CHECK
- Vars
- K(c);P-FLIGHT,XB(D)::QAR2(B),XP(b)
- Refutation
- Q(a);XQ(B)
- Try
- Actual
- R(H);
- Threat
- DUALS(14)
- Vars
- Q(a);CHECK::R(H)+B(D)
- Q(a);CHECK::B(I)+S(E)
- B(h);CHECK::B(I)+S(E)
- P(b);CHECK,XR(A)::R(H)+B(D)
- P(d);CHECK,XQ(B)::B(I)+S(E)
- P(d);CHECK,XQ(B)::R(H)+B(D)
- P(d);CHECK::B(I)+S(E)
- P(f);CHECK,P_SPINP(f),XS(E)::R(H)+B(D)
- P(f);CHECK::B(I)+S(E),DCHECK
- P(b);OGATEB::R(A)
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).