MESON Chess Problem Database
Problem Display
PID: 254522 (2b1N3/q3p2p/2QB3P/4pk1P/4pNRK/1B1nR2p/5n2/8 w - - 0 1)
Doukhan, Gerard
Probleemblad, 1983
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Ba6
- 2.Be6#
- 1...Be6
- 2.Bxe6#
- 1...Bb7
- 2.Be6#
- 1...Sd1
- 2.Qxe4#
- 1...Sh1
- 2.Qxe4#
- 1...Sxg4
- 2.Qxe4#
- 1...Sxf4
- 2.Rg5#
- 1...exf4
- 2.Rg5#
- 1...Ba6
- Tries
- 1.Se2?
- threat
- 2.Sg3#
- 2.Rg5#
- 1...Sxg4
- 2.Qxe4#
- 1...Sh1
- 2.Rg5#
- 2.Qxe4#
- 1...Qxe3!
- threat
- 1.Sg2?
- threat
- 2.Rg5#
- 1...Qxe3
- 2.Sxe3#
- 1...Sxg4
- 2.Qxe4#
- 1...hxg2!
- threat
- 1.Sxd3?
- threat
- 2.Rg5#
- 1...Sxd3
- 2.Qxe4#
- 1...Sxg4
- 2.Qxe4#
- 1...exd3
- 2.Rf3#
- 2.Rxe5#
- 2.Qf3#
- 1...Qxe3!
- threat
- 1.Sxh3?
- threat
- 2.Rg5#
- 1...Sxh3
- 2.Qxe4#
- 1...Sxg4
- 2.Qxe4#
- 1...Qxe3!
- threat
- 1.Sd5?
- threat
- 2.Sg7#
- 1...Ke6
- 2.Sxe7#
- 1...e6
- 2.Rg5#
- 1...exd6!
- threat
- 1.Se6?
- threat
- 2.S6g7#
- 2.Rg5#
- 1...Qxe3
- 2.S6g7#
- 1...Sxg4
- 2.Qxe4#
- 1...exd6
- 2.Rg5#
- 1...Bxe6!
- threat
- 1.Sg6?
- threat
- 2.Rg5#
- 1...Qxe3
- 2.Sxe7#
- 1...Sxg4
- 2.Qxe4#
- 1...hxg6!
- threat
- 1.Ba3?
- threat
- 2.Sg7#
- 1...Sxg4
- 2.Qxe4#
- 1...exf4
- 2.Rg5#
- 1...Be6
- 2.Bxe6#
- 2.Qxe6#
- 1...e6!
- threat
- 1.Bb4?
- threat
- 2.Sg7#
- 1...Sxg4
- 2.Qxe4#
- 1...exf4
- 2.Rg5#
- 1...Be6
- 2.Bxe6#
- 2.Qxe6#
- 1...e6!
- threat
- 1.Bc5?
- threat
- 2.Sg7#
- 1...Sxg4
- 2.Qxe4#
- 1...exf4
- 2.Rg5#
- 1...Be6
- 2.Bxe6#
- 2.Qxe6#
- 1...e6!
- threat
- 1.Bc7?
- threat
- 2.Sg7#
- 1...Sxg4
- 2.Qxe4#
- 1...Be6
- 2.Bxe6#
- 2.Qxe6#
- 1...e6!
- threat
- 1.Bxe7?
- threat
- 2.Sd6#
- 2.Sg7#
- 2.Qf6#
- 1...Sxg4
- 2.Qxe4#
- 1...exf4
- 2.Rg5#
- 2.Qf6#
- 1...Qd4
- 2.Sg7#
- 2.Qf6#
- 1...Qc5
- 2.Sg7#
- 2.Qf6#
- 1...Qb6
- 2.Sd6#
- 2.Sg7#
- 1...Qb8
- 2.Sg7#
- 2.Qf6#
- 1...Qa3
- 2.Sg7#
- 2.Qf6#
- 2.Qxc8#
- 1...Qa6
- 2.Sd6#
- 2.Sg7#
- 1...Qc7
- 2.Sg7#
- 2.Qf6#
- 1...Qd7
- 2.Sg7#
- 2.Qf6#
- 1...Be6
- 2.Sd6#
- 2.Sg7#
- 2.Bxe6#
- 2.Qxe6#
- 1...Qxe7+!
- threat
- 1.Bb8?
- threat
- 2.Sg7#
- 1...Sxg4
- 2.Qxe4#
- 1...Be6
- 2.Bxe6#
- 2.Qxe6#
- 1...e6!
- threat
- 1.Qxc8+?
- 1...e6
- 2.Bxe6#
- 2.Qxe6#
- 1...Qd7!
- 1...e6
- 1.Se2?
- Keys
- 1.Bxe5!
- threat
- 2.Rg5#
- 1...Kxe5
- 2.Qd5#
- 1...Sxg4
- 2.Qxe4#
- 1...Sxe5
- 2.Sg7#
- threat
- 1.Bxe5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- B(j);N_GUARD::B(A)
- B(j);N_GUARD::B(A),XB(j)
- S(a);N_GUARD::QAB1(G),XP(d)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- S(b);SBLOCK,XS(C)::R1(D)
- P(e);XS(C)::R1(D)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- Q(g);XR(B)
- Try
- S(C);
- Threat
- R1(D)
- Vars
- Q(g);XR(B)::S(C),XQ(g)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- P(c);XS(C)
- Try
- S(C);XS(b)
- Threat
- R1(D)
- Vars
- S(a);N_GUARD,XS(C)::QAB1(G),XP(d)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- Q(g);XR(B)
- Try
- S(C);XP(c)
- Threat
- R1(D)
- Vars
- S(a);N_GUARD,XS(C)::QAB1(G),XP(d)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- Q(g);XR(B)
- Try
- S(C);
- Threat
- S(J)
- Vars
- K(f);S_CUTQ(g),S_FLIGHT::B(A)+S(C),XP(h)
- P(h);SBLOCK::R1(D)
- Refutation
- P(h);XB(H)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(g);XR(B)::S(C)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- P(h);XB(H)::R1(D)
- Refutation
- B(j);XS(C)
- Try
- S(C);
- Threat
- R1(D)
- Vars
- Q(g);N_GUARD,XR(B)::S(C),XP(h)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- P(i);XS(C)
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- P(e);SBLOCK,XS(C)::R1(D)
- Refutation
- P(h);
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- P(e);SBLOCK,XS(C)::R1(D)
- Refutation
- P(h);
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- P(e);SBLOCK,XS(C)::R1(D)
- Refutation
- P(h);
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- P(h);
- Try
- B(H);XP(h)
- Threat
- DUALS(3)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- Q(g);CHECK,XB(H)
- Try
- B(H);
- Threat
- S(J)
- Vars
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- Refutation
- P(h);
- Try
- Q(G);CHECK,XB(j)
- Refutation
- Q(g);P_SPINQ(g)
- Try
- Actual
- B(H);XP(e)
- Threat
- R1(D)
- Vars
- K(f);OGATEB,P-FLIGHT,P_SPINP(d),XB(H)::QAR1(G)
- S(a);N_GUARD,XR(D)::QAB1(G),XP(d)
- S(b);SBLOCK,XB(H)::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).