MESON Chess Problem Database
Problem Display
PID: 132817 (6r1/P1NPPr2/K3p1Q1/1p2Bn1p/1p1Pk3/1B2nb2/2P1R1q1/5R1N w - - 0 1)
Boyer, Jean-Pierre
di Scala, Pascal
15th Place, 01. WCCT, 1972-1975
#2
13 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxf1
- 2.Sg3#
- 1...Qh3
- 2.Sf2#
- 1...Qxe2
- 2.Sg3#
- 1...Qf2
- 2.Sxf2#
- 1...Qg3
- 2.Sxg3#
- 1...Qg4
- 2.Sf2#
- 1...Qg5
- 2.Sf2#
- 1...Qxg6
- 2.Sf2#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Rg7
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- 1...Bg4
- 2.Rf4#
- 1...Qxf1
- Tries
- 1.Se8?
- threat
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qxf1
- 2.Sg3#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qxh1
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qxe2
- 2.Sg3#
- 2.Sd6#
- 1...Qxg6
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.Sd6#
- 2.Sf6#
- 2.a8Q#
- 2.a8B#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Sd6#
- 2.Rf4#
- 1...Qh3
- 2.Sf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg1
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qf2
- 2.Sxf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg3
- 2.Sxg3#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg4
- 2.Sf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg5
- 2.Sf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rf6
- 2.Sd6#
- 2.Sxf6#
- 2.a8Q#
- 2.a8B#
- 1...Rfg7
- 2.Sd6#
- 2.Sf6#
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.Sd6#
- 2.Sf6#
- 2.a8Q#
- 2.a8B#
- 1...Rff8
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rgg7
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rgf8
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Bg4
- 2.Sd6#
- 2.Rf4#
- 2.a8Q#
- 2.a8B#
- 1...h4
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rxe8!
- threat
- 1.Bc4?
- threat
- 2.Bd3#
- 1...Qxe2
- 2.Sg3#
- 1...Bxe2
- 2.Rf4#
- 1...bxc4!
- threat
- 1.Bxe6?
- threat
- 2.Bd5#
- 1...Qxe2
- 2.Sg3#
- 1...Qxg6
- 2.Sf2#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- 1...Rf6!
- threat
- 1.Qg4+?
- 1...Qxg4
- 2.Sf2#
- 1...Rxg4
- 2.a8Q#
- 2.a8B#
- 1...Bxg4
- 2.Rf4#
- 1...hxg4!
- 1...Qxg4
- 1.d8Q?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Qxf1
- 2.Sg3#
- 2.a8Q#
- 2.a8B#
- 1...Qxh1
- 2.a8Q#
- 2.a8B#
- 1...Qxe2
- 2.Sg3#
- 1...Qxg6
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.a8Q#
- 2.a8B#
- 1...Rxg6
- 2.Qa8#
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- 1...Rf6
- 2.a8Q#
- 2.a8B#
- 1...Qh3
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg1
- 2.a8Q#
- 2.a8B#
- 1...Qf2
- 2.Sxf2#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.a8Q#
- 2.a8B#
- 1...Qg3
- 2.Sxg3#
- 2.a8Q#
- 2.a8B#
- 1...Qg4
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg5
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rfg7
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.a8Q#
- 2.a8B#
- 1...Rff8
- 2.a8Q#
- 2.a8B#
- 1...Rgg7
- 2.Qa8#
- 2.a8Q#
- 2.a8B#
- 1...Re8
- 2.a8Q#
- 2.a8B#
- 1...Rgf8
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.a8Q#
- 2.a8B#
- 1...Bg4
- 2.Rf4#
- 2.a8Q#
- 2.a8B#
- 1...h4
- 2.a8Q#
- 2.a8B#
- 1...Rxd8!
- threat
- 1.d8S?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Qxf1
- 2.Sg3#
- 2.a8Q#
- 2.a8B#
- 1...Qxh1
- 2.a8Q#
- 2.a8B#
- 1...Qxe2
- 2.Sg3#
- 1...Qxg6
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.a8Q#
- 2.a8B#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- 1...Rf6
- 2.a8Q#
- 2.a8B#
- 1...Qh3
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg1
- 2.a8Q#
- 2.a8B#
- 1...Qf2
- 2.Sxf2#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.a8Q#
- 2.a8B#
- 1...Qg3
- 2.Sxg3#
- 2.a8Q#
- 2.a8B#
- 1...Qg4
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg5
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rfg7
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.a8Q#
- 2.a8B#
- 1...Rff8
- 2.a8Q#
- 2.a8B#
- 1...Rgg7
- 2.a8Q#
- 2.a8B#
- 1...Re8
- 2.a8Q#
- 2.a8B#
- 1...Rgf8
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.a8Q#
- 2.a8B#
- 1...Bg4
- 2.Rf4#
- 2.a8Q#
- 2.a8B#
- 1...h4
- 2.a8Q#
- 2.a8B#
- 1...Rxd8!
- threat
- 1.d8B?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Qxf1
- 2.Sg3#
- 2.a8Q#
- 2.a8B#
- 1...Qxh1
- 2.a8Q#
- 2.a8B#
- 1...Qxe2
- 2.Sg3#
- 1...Qxg6
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.a8Q#
- 2.a8B#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- 1...Rf6
- 2.a8Q#
- 2.a8B#
- 1...Qh3
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg1
- 2.a8Q#
- 2.a8B#
- 1...Qf2
- 2.Sxf2#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.a8Q#
- 2.a8B#
- 1...Qg3
- 2.Sxg3#
- 2.a8Q#
- 2.a8B#
- 1...Qg4
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg5
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rfg7
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.a8Q#
- 2.a8B#
- 1...Rff8
- 2.a8Q#
- 2.a8B#
- 1...Rgg7
- 2.a8Q#
- 2.a8B#
- 1...Re8
- 2.a8Q#
- 2.a8B#
- 1...Rgf8
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.a8Q#
- 2.a8B#
- 1...Bg4
- 2.Rf4#
- 2.a8Q#
- 2.a8B#
- 1...h4
- 2.a8Q#
- 2.a8B#
- 1...Rxd8!
- threat
- 1.d8R?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Qxf1
- 2.Sg3#
- 2.a8Q#
- 2.a8B#
- 1...Qxh1
- 2.a8Q#
- 2.a8B#
- 1...Qxe2
- 2.Sg3#
- 1...Qxg6
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.a8Q#
- 2.a8B#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- 1...Rf6
- 2.a8Q#
- 2.a8B#
- 1...Qh3
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg1
- 2.a8Q#
- 2.a8B#
- 1...Qf2
- 2.Sxf2#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.a8Q#
- 2.a8B#
- 1...Qg3
- 2.Sxg3#
- 2.a8Q#
- 2.a8B#
- 1...Qg4
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Qg5
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rfg7
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.a8Q#
- 2.a8B#
- 1...Rff8
- 2.a8Q#
- 2.a8B#
- 1...Rgg7
- 2.a8Q#
- 2.a8B#
- 1...Re8
- 2.a8Q#
- 2.a8B#
- 1...Rgf8
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.a8Q#
- 2.a8B#
- 1...Bg4
- 2.Rf4#
- 2.a8Q#
- 2.a8B#
- 1...h4
- 2.a8Q#
- 2.a8B#
- 1...Rxd8!
- threat
- 1.e8S?
- threat
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qxf1
- 2.Sg3#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qxh1
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qxe2
- 2.Sg3#
- 2.Sd6#
- 1...Qxg6
- 2.Sf2#
- 2.a8Q#
- 2.a8B#
- 1...Rxd7
- 2.Sf6#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Sd6#
- 2.Rf4#
- 1...Rf6
- 2.Sd6#
- 2.Sxf6#
- 2.a8Q#
- 2.a8B#
- 1...Qh3
- 2.Sf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg1
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qf2
- 2.Sxf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qh2
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg3
- 2.Sxg3#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg4
- 2.Sf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Qg5
- 2.Sf2#
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Re7
- 2.Sd6#
- 2.Sf6#
- 2.a8Q#
- 2.a8B#
- 1...Rfg7
- 2.Sd6#
- 2.Sf6#
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.Sd6#
- 2.Sf6#
- 2.a8Q#
- 2.a8B#
- 1...Rff8
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rgg7
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rgf8
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rh8
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Bg4
- 2.Sd6#
- 2.Rf4#
- 2.a8Q#
- 2.a8B#
- 1...h4
- 2.Sd6#
- 2.a8Q#
- 2.a8B#
- 1...Rxe8!
- threat
- 1.Se8?
- Keys
- 1.Sxb5!
- threat
- 2.Sd6#
- 1...Qxe2
- 2.Sg3#
- 1...Qxg6
- 2.Sf2#
- 1...Rxg6
- 2.a8Q#
- 2.a8B#
- 1...Bxe2
- 2.Rf4#
- threat
- 1.Sxb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- Q(a);N_GUARD,XR(A)::S(B)
- Q(a);N_GUARD::S(B)
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- Q(a);N_GUARD::S(B),XQ(a)
- Q(a);N_GUARD,XQ(I)::S(B)
- R(k);N_GUARD,XQ(I)::P=Q
- R(k);N_GUARD::P=Q
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- B(c);OGATE::R1(A)
- Tries
- Try
- S(K);
- Threat
- DUALS(3)
- Vars
- R(k);XQ(I)::P=Q
- Refutation
- R(k);XS(K)
- Try
- B(E);
- Threat
- B(E)
- Vars
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- Refutation
- P(f);XB(E)
- Try
- B(E);XP(i)
- Threat
- B(E)
- Vars
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- Q(a);N_GUARD,P_PINB(E),XQ(I)::S(B)
- R(k);N_GUARD,P_PINB(E),XQ(I)::P=Q
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- Refutation
- R(j);P_PINB(E)
- Try
- Q(I);CHECK
- Vars
- Q(a);XQ(I)::S(B)
- R(k);XQ(I)::P=Q
- B(c);OGATE,XQ(I)::R1(A)
- Refutation
- P(h);XQ(I)
- Try
- P(L);
- Threat
- P=Q
- Vars
- Q(a);XS(B)::P=Q
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- R(j);XP(M)::P=Q
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- R(j);::P=Q
- Q(a);::P=Q
- R(k);::P=Q
- P(h);::P=Q
- Refutation
- R(k);XQ(L)
- Try
- P(L);
- Threat
- P=Q
- Vars
- Q(a);XS(B)::P=Q
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- R(j);XP(M)::P=Q
- R(k);XQ(I)::P=Q
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- R(j);::P=Q
- Q(a);::P=Q
- R(k);::P=Q
- P(h);::P=Q
- Refutation
- R(k);XS(L)
- Try
- P(L);
- Threat
- P=Q
- Vars
- Q(a);XS(B)::P=Q
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- R(j);XP(M)::P=Q
- R(k);XQ(I)::P=Q
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- R(j);::P=Q
- Q(a);::P=Q
- R(k);::P=Q
- P(h);::P=Q
- Refutation
- R(k);XB(L)
- Try
- P(L);
- Threat
- P=Q
- Vars
- Q(a);XS(B)::P=Q
- Q(a);N_GUARD,N_SPINS(b),P_SPINS(g),XR(D)::S(B)
- R(j);XP(M)::P=Q
- R(k);XQ(I)::P=Q
- B(c);N_SPINS(b),OGATE,P_SPINS(g),XR(D)::R1(A)
- R(j);::P=Q
- Q(a);::P=Q
- R(k);::P=Q
- P(h);::P=Q
- Refutation
- R(k);XR(L)
- Try
- P(M);
- Threat
- DUALS(3)
- Vars
- R(j);N_GUARD,XP(L)::S(M)
- R(k);XQ(I)::P=Q
- Refutation
- R(k);XS(M)
- Try
- Actual
- S(K);XP(f)
- Threat
- S(K)
- Vars
- Q(a);N_GUARD,N_SPINS(b),P_PINS(K),P_SPINS(g),XR(D)::S(B)
- Q(a);N_GUARD,XQ(I)::S(B)
- R(k);N_GUARD,XQ(I)::P=Q
- B(c);N_SPINS(b),OGATE,P_PINS(K),P_SPINS(g),XR(D)::R1(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).