MESON Chess Problem Database
Problem Display
PID: 222639 (3K4/n7/2P1B3/3N3R/Qpk5/3b1R2/2P2B2/3rb3 w - - 0 1)
Mackay, Donald
1st Prize, English Mechanic and World of Science, 1883
(First published on Fri Aug 24 1883)
#2
9 + 6
| 6490 | yacpdb | 2020 |
| 15239 | Valois Notebooks | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.cxd3#
- 1...Rb1
- 2.cxd3#
- 1...Rc1
- 2.cxd3#
- 1...Rd2
- 2.Qxb4#
- 1...Bd2
- 2.cxd3#
- 1...Bxf2
- 2.Qxb4#
- 1...Bc3
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 1...Sb5
- 2.Qb3#
- 1...Sxc6+
- 2.Qxc6#
- 1...Sc8
- 2.Qa6#
- 1...Ra1
- Tries
- 1.Kc7?
- 1...Bxf2
- 2.Qxb4#
- 1...Bxc2
- 2.Sb6#
- 1...Sxc6
- 2.Qxc6#
- 2.Qa6#
- 1...Ra1
- 2.cxd3#
- 1...Rb1
- 2.cxd3#
- 1...Rc1
- 2.cxd3#
- 1...Rd2
- 2.Qxb4#
- 1...Bd2
- 2.cxd3#
- 1...Bc3
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Se7#
- 1...Bf1
- 2.Sb6#
- 1...Be2
- 2.Sb6#
- 1...Be4
- 2.Sb6#
- 1...Bf5
- 2.Sb6#
- 1...Bg6
- 2.Sb6#
- 1...Bh7
- 2.Sb6#
- 1...Sc8
- 2.Qa6#
- 1...Sb5+!
- 1...Bxf2
- 1.Ke7?
- 1...Sxc6+
- 2.Qxc6#
- 1...Bxf2
- 2.Qxb4#
- 1...Bxc2
- 2.Sb6#
- 1...Ra1
- 2.cxd3#
- 1...Rb1
- 2.cxd3#
- 1...Rc1
- 2.cxd3#
- 1...Rd2
- 2.Qxb4#
- 1...Bd2
- 2.cxd3#
- 1...Bc3
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Bf1
- 2.Sb6#
- 1...Be2
- 2.Sb6#
- 1...Be4
- 2.Sb6#
- 1...Bf5
- 2.Sb6#
- 1...Bg6
- 2.Sb6#
- 1...Bh7
- 2.Sb6#
- 1...Sb5
- 2.Qb3#
- 1...Sc8+!
- 1...Sxc6+
- 1.Ke8?
- 1...Bxf2
- 2.Qxb4#
- 1...Bxc2
- 2.Sb6#
- 1...Sxc6
- 2.Qxc6#
- 2.Qa6#
- 1...Ra1
- 2.cxd3#
- 1...Rb1
- 2.cxd3#
- 1...Rc1
- 2.cxd3#
- 1...Rd2
- 2.Qxb4#
- 1...Bd2
- 2.cxd3#
- 1...Bc3
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 1...Bf1
- 2.Sb6#
- 1...Be2
- 2.Sb6#
- 1...Be4
- 2.Sb6#
- 1...Bf5
- 2.Sb6#
- 1...Bh7
- 2.Sb6#
- 1...Sb5
- 2.Qb3#
- 1...Sc8
- 2.Qa6#
- 1...Bg6+!
- 1...Bxf2
- 1.Bxa7?
- threat
- 2.Qa6#
- 1...Ra1
- 2.cxd3#
- 1...Bh4+!
- threat
- 1.Rxd3?
- threat
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Rh4#
- 1...Sxc6+
- 2.Qxc6#
- 1...Bxf2
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Qxb4#
- 1...Bd2
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 1...Bc3
- 2.Sxc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Rxc3#
- 1...Sb5
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Qb3#
- 1...Rxd3!
- threat
- 1.Qa2+?
- 1...b3
- 2.Qxb3#
- 1...Kb5!
- 1...b3
- 1.Kc7?
- Keys
- 1.Bd7!
- 1...Sxc6+
- 2.Qxc6#
- 1...Bxf2
- 2.Qxb4#
- 1...Bxc2
- 2.Sb6#
- 1...Bf5
- 2.Sb6#
- 1...Ra1
- 2.cxd3#
- 1...Rb1
- 2.cxd3#
- 1...Rc1
- 2.cxd3#
- 1...Rd2
- 2.Qxb4#
- 1...Bd2
- 2.cxd3#
- 1...Bc3
- 2.Sb6#
- 1...Bf1
- 2.Sb6#
- 1...Be2
- 2.Sb6#
- 1...Be4
- 2.Sb6#
- 1...Bg6
- 2.Sb6#
- 1...Bh7
- 2.Sb6#
- 1...Sb5
- 2.Qb3#
- 1...Sc8
- 2.Qa6#
- 1...Sxc6+
- 1.Bd7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD::P(A),XB(c)
- R(a);S_CUTB(b)::QAR1(D),XP(d)
- B(b);S_CUTR(a)::P(A),XB(c)
- B(b);N_GUARD,XB(B)::QAR1(D),XP(d)
- S(f);SBLOCK::QAB1(D)
- S(f);CHECK,OGATE,XP(G)::QAR2(D),XS(f)
- S(f);N_GUARD::QAB(D)
- Tries
- Try
- K(I);S_FLIGHT
- Vars
- B(b);N_GUARD,XB(B)::QAR1(D),XP(d)
- B(c);XP(A)::B(H)+S(E),DCHECK
- R(a);N_GUARD::P(A),XB(c)
- R(a);S_CUTB(b)::QAR1(D),XP(d)
- B(b);S_CUTR(a)::P(A),XB(c)
- B(c);::B(H)+S(E),DCHECK
- S(f);N_GUARD::QAB(D)
- Refutation
- S(f);CHECK
- Try
- K(I);S_FLIGHT
- Vars
- S(f);CHECK,OGATE,XP(G)::QAR2(D),XS(f)
- B(b);N_GUARD,XB(B)::QAR1(D),XP(d)
- B(c);XP(A)::B(H)+S(E),DCHECK
- R(a);N_GUARD::P(A),XB(c)
- R(a);S_CUTB(b)::QAR1(D),XP(d)
- B(b);S_CUTR(a)::P(A),XB(c)
- B(c);::B(H)+S(E),DCHECK
- S(f);SBLOCK::QAB1(D)
- Refutation
- S(f);CHECK
- Try
- K(I);P-FLIGHT
- Vars
- B(b);N_GUARD,XB(B)::QAR1(D),XP(d)
- B(c);XP(A)::B(H)+S(E),DCHECK
- R(a);N_GUARD::P(A),XB(c)
- R(a);S_CUTB(b)::QAR1(D),XP(d)
- B(b);S_CUTR(a)::P(A),XB(c)
- B(c);::B(H)+S(E),DCHECK
- S(f);SBLOCK::QAB1(D)
- S(f);N_GUARD::QAB(D)
- Refutation
- B(c);CHECK
- Try
- B(B);XS(f)
- Threat
- QAB(D)
- Vars
- R(a);N_GUARD::P(A),XB(c)
- Refutation
- B(b);CHECK
- Try
- R(C);XB(c)
- Threat
- DUALS(9)
- Vars
- S(f);CHECK,OGATE,XP(G)::QAR2(D),XS(f)
- Refutation
- R(a);P_PINS(E),XR(C)
- Try
- Q(D);CHECK,N_PINP(d)
- Vars
- P(d);P_SPINP(d)::QAB1(D),XP(d)
- Refutation
- K(e);S_FLIGHT
- Try
- Actual
- B(H);
- Vars
- S(f);CHECK,OGATE,XP(G)::QAR2(D),XS(f)
- B(b);N_GUARD,XB(B)::QAR1(D),XP(d)
- B(c);XP(A)::S(E)
- B(c);::S(E)
- R(a);N_GUARD::P(A),XB(c)
- R(a);S_CUTB(b)::QAR1(D),XP(d)
- B(b);S_CUTR(a)::P(A),XB(c)
- B(b);SBLOCK::S(E)
- S(f);SBLOCK::QAB1(D)
- S(f);N_GUARD::QAB(D)
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).