MESON Chess Problem Database
Problem Display
PID: 140887 (1b1R1N2/3Q2p1/1Np2pP1/2p1k3/1pp1BnPK/6n1/q3R1PB/5r2 w - - 0 1)
Aarzen, Hans
Probleemblad, 1982
#2
11 + 12
| 15148 | Sadier Collection | 2011 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxc4#
- 1...Qa1
- 2.Sxc4#
- 1...Qb2
- 2.Sxc4#
- 1...Qd2
- 2.Sxc4#
- 1...Qa3
- 2.Sxc4#
- 1...Qa4
- 2.Sxc4#
- 1...Qa5
- 2.Sxc4#
- 1...Qa7
- 2.Sxc4#
- 1...Qa8
- 2.Sxc4#
- 1...Bd6
- 2.Qxd6#
- 1...Ba7
- 2.Qd6#
- 2.Qc7#
- 1...Bc7
- 2.Qxc7#
- 1...Sh1
- 2.Bc2#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sgxe2
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sxe4
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sf5+
- 2.Qxf5#
- 1...Sgh5
- 2.Bc2#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sxg6+
- 2.Sxg6#
- 1...b3
- 2.Sxc4#
- 1...f5
- 2.Qxg7#
- 1...Qb1
- Tries
- 1.Bxg3?
- threat
- 2.Bc2#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Qxe2
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Bd6
- 2.Qxd6#
- 1...f5
- 2.Qxf5#
- 2.Qe6#
- 2.Qe7#
- 2.Qxg7#
- 1...Qb3
- 2.Bd3#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Qc2
- 2.Bxc2#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Qd2
- 2.Sxc4#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Qa3
- 2.Sxc4#
- 2.Bd3#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Qa7
- 2.Sxc4#
- 2.Bb1#
- 2.Bc2#
- 2.Bd3#
- 2.Bf3#
- 2.Bf5#
- 2.Bxc6#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 1...Re1
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Rf2
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Rf3
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...c3
- 2.Bc2#
- 2.Qf5#
- 1...Rh1+!
- threat
- 1.Bc2+?
- 1...Sgxe2
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Se4
- 2.Rxe4#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sfxe2!
- 1...Sgxe2
- 1.Bd3+?
- 1...Qxe2
- 2.Sxc4#
- 1...Sgxe2
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Se4
- 2.Rxe4#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sfxe2!
- 1...Qxe2
- 1.Bf3+?
- 1...Sgxe2
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Se4
- 2.Rxe4#
- 2.Re8#
- 2.Qf5#
- 2.Qe6#
- 2.Qe8#
- 2.Qe7#
- 1...Sfxe2
- 2.Qf5#
- 1...Qxe2!
- 1...Sgxe2
- 1.Bxg3?
- Keys
- 1.Qd2!
- threat
- 2.Sbd7#
- 1...Sf5+
- 2.Bxf5#
- 1...Sxg2+
- 2.Bxg2#
- 1...Sxg6+
- 2.Bxg6#
- 1...Qxd2
- 2.Sxc4#
- 1...Sgxe2
- 2.Re8#
- 1...Sfxe2
- 2.Re8#
- 1...Qa7
- 2.Sxc4#
- 1...Sd3
- 2.Bxd3#
- 2.Bf3#
- 2.Bf5#
- 2.Bxc6#
- 1...Sd5
- 2.Bxd5#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- Q(b);N_GUARD::S(G),XP(e)
- B(l);N_GUARD::QAB1(I),XB(l)
- B(l);N_GUARD::QAB(I),XB(l)
- S(c);CHECK,N_GUARD,P_SPINS(f)::QAR1(I),XS(c)
- S(f);CHECK,P_SPINS(c),XP(H)::S(K),XS(f)
- P(d);S_CUTQ(b)::S(G),XP(e)
- P(j);OGATEB::QAB(I),XP(k)
- Tries
- Try
- B(C);P_PINS(f),XS(c)
- Threat
- DUALS(6)
- Vars
- B(l);N_GUARD::QAB1(I),XB(l)
- Refutation
- R(a);CHECK
- Try
- B(D);CHECK
- Refutation
- S(f);P_SPINS(c),XR(A)
- Try
- B(D);CHECK
- Vars
- Q(b);XR(A)::S(G),XP(e)
- Refutation
- S(f);P_SPINS(c),XR(A)
- Try
- B(D);CHECK
- Vars
- S(f);P_SPINS(c),XR(A)::QAR1(I)
- Refutation
- Q(b);XR(A)
- Try
- Actual
- Q(I);
- Threat
- S(G)
- Vars
- S(c);CHECK,N_GUARD,P_SPINS(f)::R(A)+B(D),XS(c)
- S(f);CHECK,OGATE,P_SPINS(c),XP(B)::R(A)+B(D),XS(f)
- S(f);CHECK,OGATE,P_SPINS(c),XP(H)::R(A)+B(D),XS(f)
- Q(b);N_GUARD,XQ(I)::S(G),XP(e)
- S(c);P_SPINS(f),XR(A)::R(J)
- S(f);N_GUARD,P_SPINS(c),XR(A)::R(J)
- Q(b);N_GUARD::S(G),XP(e)
- S(f);N_GUARD,P_SPINS(c)::R(A)+B(D),XS(f)
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).