MESON Chess Problem Database
Problem Display
PID: 2516 (3brrb1/8/1P6/Q5p1/2q1k1P1/pR2pN2/K1P1NRPB/1B6 w - - 0 1)
Loyd, Sam
L'Universe Illustre, 1867
#2
12 + 9
| 1679 | American Chess Nuts | 1868 |
| 3019 | The Sphinx | 1868 |
| 5206 | Sam Loyd and His Chess Problems | 1913 |
| 3485 | Sachova skladba | 2006 |
SOLUTION
- SOUND
- Sets
- 1...Qxb3+
- 2.cxb3#
- 1...Qd3
- 2.cxd3#
- 1...Qb5
- 2.Sc3#
- 2.c4#
- 1...Qd5
- 2.Sc3#
- 1...Qa6
- 2.Sc3#
- 2.c4#
- 1...Qe6
- 2.Sc3#
- 2.c3#
- 2.c4#
- 1...Qf7
- 2.Sc3#
- 2.c3#
- 2.c4#
- 1...Qxc2+
- 2.Bxc2#
- 1...Qc3
- 2.Sxc3#
- 1...Qa4
- 2.Sc3#
- 2.c3#
- 2.c4#
- 1...Qb4
- 2.c3#
- 2.c4#
- 1...Qc5
- 2.c4#
- 1...Qc6
- 2.c3#
- 2.c4#
- 1...Qc7
- 2.c3#
- 2.c4#
- 1...Qc8
- 2.c3#
- 2.c4#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Sxg5#
- 1...Rxf3
- 2.gxf3#
- 1...Rf4
- 2.Sg3#
- 1...Rf5
- 2.Qxf5#
- 1...Rf6
- 2.Sxg5#
- 1...Bxb6
- 2.Sxg5#
- 1...Bf6
- 2.Qf5#
- 1...Bc7
- 2.Sxg5#
- 1...Be7
- 2.Qe5#
- 1...Be6
- 2.Qe5#
- 1...Bf7
- 2.Qf5#
- 1...exf2
- 2.Sd2#
- 1...Qxb3+
- Tries
- 1.Be5?
- threat
- 2.Sg3#
- 1...Qxb3+
- 2.cxb3#
- 1...Qxc2+
- 2.Bxc2#
- 1...Rxe5
- 2.Qxe5#
- 1...Rxf3
- 2.gxf3#
- 1...Qb5
- 2.Sc3#
- 2.c4#
- 1...Qc5
- 2.c4#
- 1...Qxe2!
- threat
- 1.Bd6?
- threat
- 2.Sg3#
- 1...Qxb3+
- 2.cxb3#
- 1...Qxc2+
- 2.Bxc2#
- 1...Rxf3
- 2.gxf3#
- 1...Qb5
- 2.Sc3#
- 2.c4#
- 1...Qc5
- 2.c4#
- 1...Re5
- 2.Qxe5#
- 1...Qxe2!
- threat
- 1.Bc7?
- threat
- 2.Sg3#
- 1...Qxb3+
- 2.cxb3#
- 1...Qxc2+
- 2.Bxc2#
- 1...Qxc7
- 2.c3#
- 2.c4#
- 1...Rxf3
- 2.gxf3#
- 1...Bxc7
- 2.Sxg5#
- 1...Qb5
- 2.Sc3#
- 2.c4#
- 1...Qc5
- 2.c4#
- 1...Re5
- 2.Qxe5#
- 1...Qxe2!
- threat
- 1.Bb8?
- threat
- 2.Sg3#
- 1...Qxb3+
- 2.cxb3#
- 1...Qxc2+
- 2.Bxc2#
- 1...Rxf3
- 2.gxf3#
- 1...Qb5
- 2.Sc3#
- 2.c4#
- 1...Qc5
- 2.c4#
- 1...Qc7
- 2.c3#
- 2.c4#
- 1...Re5
- 2.Qxe5#
- 1...Bc7
- 2.Sxg5#
- 1...Qxe2!
- threat
- 1.Qa8+?
- 1...Qd5
- 2.Sc3#
- 2.c3#
- 2.c4#
- 1...Qc6
- 2.Sc3#
- 2.c4#
- 1...Bd5!
- 1...Qd5
- 1.Be5?
- Keys
- 1.Qc5!
- 1...Qxb3+
- 2.cxb3#
- 1...Qxc2+
- 2.Bxc2#
- 1...Qxe2
- 2.Qd4#
- 1...Qxc5
- 2.c4#
- 1...Rxf3
- 2.gxf3#
- 1...Bxb6
- 2.Sxg5#
- 1...exf2
- 2.Sd2#
- 1...Qd4
- 2.Qxd4#
- 1...Qd3
- 2.cxd3#
- 1...Qb5
- 2.Sc3#
- 2.Qd4#
- 2.c4#
- 1...Qd5
- 2.Sc3#
- 2.Qxe3#
- 1...Qa6
- 2.Sc3#
- 2.Qd4#
- 2.c4#
- 1...Qe6
- 2.Sc3#
- 2.Qd4#
- 2.c3#
- 2.c4#
- 1...Qf7
- 2.Sc3#
- 2.Qd4#
- 2.c3#
- 2.c4#
- 1...Qc3
- 2.Sxc3#
- 1...Qa4
- 2.Sc3#
- 2.c3#
- 2.c4#
- 1...Qb4
- 2.c3#
- 2.c4#
- 1...Re5
- 2.Qxe5#
- 1...Re6
- 2.Qxc4#
- 1...Re7
- 2.Sxg5#
- 1...Rf4
- 2.Sg3#
- 1...Rf5
- 2.Qxf5#
- 1...Rf6
- 2.Sxg5#
- 1...Rf7
- 2.Qxc4#
- 1...Bf6
- 2.Qf5#
- 1...Bc7
- 2.Sxg5#
- 1...Be7
- 2.Qe5#
- 1...Bd5
- 2.Qxe3#
- 1...Be6
- 2.Qe5#
- 1...Bf7
- 2.Qf5#
- 1...Bh7
- 2.Qxc4#
- 1...Qxb3+
- 1.Qc5!
There are these versions: 222481
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- Q(c);CHECK,OGATE,XR(H)::B(A)+P(C),XQ(c)
- Q(c);OGATE::P(C),XQ(c)
- Q(c);N_GUARD::S(D)
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
- Q(c);N_GUARD::S(D),XQ(c)
- Q(c);OGATE::B(A)+P(C)
- R(g);N_GUARD::QAR1(K),XR(g)
- R(g);S_CUTB(f)::S(I),XP(e)
- R(h);OGATE,XS(I)::P(F),XR(h)
- R(h);SBLOCK::S(D)
- R(h);N_GUARD::QAB1(K),XR(h)
- R(h);S_CUTB(f)::S(I),XP(e)
- B(f);N_GUARD,XP(L)::S(I),XP(e)
- B(f);S_CUTR(h)::QAB1(K)
- B(f);N_GUARD::S(I),XP(e)
- B(f);S_CUTR(g)::QAR1(K)
- B(i);S_CUTR(g)::QAR1(K)
- B(i);S_CUTR(h)::QAB1(K)
- P(b);N_GUARD,XR(E)::S(I)
- Tries
- Try
- B(G);
- Threat
- S(D)
- Vars
- Q(c);CHECK,OGATE,XR(H)::B(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
- R(g);OGATE,XB(G)::QAR1(K),XR(g)
- R(h);OGATE,XS(I)::P(F),XR(h)
- Q(c);OGATE::B(A)+P(C)
- Refutation
- Q(c);P_PINP(C),XS(D)
- Try
- B(G);
- Threat
- S(D)
- Vars
- Q(c);CHECK,OGATE,XR(H)::B(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
- R(h);OGATE,XS(I)::P(F),XR(h)
- Q(c);OGATE::B(A)+P(C)
- R(g);N_GUARD::QAR1(K),XR(g)
- Refutation
- Q(c);P_PINP(C),XS(D)
- Try
- B(G);
- Threat
- S(D)
- Vars
- Q(c);CHECK,OGATE,XR(H)::B(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
- R(h);OGATE,XS(I)::P(F),XR(h)
- B(f);N_GUARD,XB(G)::S(I),XP(e)
- Q(c);OGATE::B(A)+P(C)
- R(g);N_GUARD::QAR1(K),XR(g)
- Refutation
- Q(c);P_PINP(C),XS(D)
- Try
- B(G);
- Threat
- S(D)
- Vars
- Q(c);CHECK,OGATE,XR(H)::B(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
- R(h);OGATE,XS(I)::P(F),XR(h)
- Q(c);OGATE::B(A)+P(C)
- R(g);N_GUARD::QAR1(K),XR(g)
- B(f);N_GUARD::S(I),XP(e)
- Refutation
- Q(c);P_PINP(C),XS(D)
- Try
- Q(K);CHECK
- Refutation
- B(i);P_SPINB(i)
- Try
- Actual
- Q(K);
- Vars
- Q(c);CHECK,OGATE,XR(H)::B(A)+P(C),XQ(c)
- Q(c);CHECK,OGATE,P_SPINQ(c),XP(C)::B(A),XQ(c)
- Q(c);N_GUARD,P_PINP(C),XS(D)::QAR1(K)
- Q(c);OGATE,XQ(K)::B(A)+P(C)
- R(h);OGATE,XS(I)::P(F),XR(h)
- B(f);N_GUARD,XP(L)::S(I),XP(e)
- P(b);N_GUARD,XR(E)::S(I)
- Q(c);N_GUARD::QAR1(K),XQ(c)
- Q(c);OGATE::P(C),XQ(c)
- Q(c);N_GUARD::S(D),XQ(c)
- R(g);N_GUARD::QAR1(K),XR(g)
- R(g);S_CUTB(i)::QAR2(K),XQ(c)
- R(g);S_CUTB(f)::S(I),XP(e)
- R(h);SBLOCK::S(D)
- R(h);N_GUARD::QAB1(K),XR(h)
- R(h);S_CUTB(f)::S(I),XP(e)
- R(h);S_CUTB(i)::QAR2(K),XQ(c)
- B(f);S_CUTR(h)::QAB1(K)
- B(f);N_GUARD::S(I),XP(e)
- B(f);S_CUTR(g)::QAR1(K)
- B(i);SBLOCK::QAR1(K),XP(b)
- B(i);S_CUTR(g)::QAR1(K)
- B(i);S_CUTR(h)::QAB1(K)
- B(i);N_GUARD::QAR2(K),XQ(c)
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).