MESON Chess Problem Database
Problem Display
PID: 2853 (6QK/8/6P1/4p3/1R1Pk1P1/r1pR2P1/1r4n1/1N2N1B1 w - - 0 1)
Mackenzie, Arthur Ford
Source?, 1892
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Rba2
- 2.d5#
- 1...Rc2
- 2.d5#
- 1...Rd2
- 2.d5#
- 1...Re2
- 2.d5#
- 1...Rf2
- 2.d5#
- 1...Ra1
- 2.Sxc3#
- 1...Raa2
- 2.Sxc3#
- 1...Rb3
- 2.Qa8#
- 1...Ra4
- 2.Sxc3#
- 1...Ra5
- 2.Sxc3#
- 1...Ra6
- 2.Sxc3#
- 1...Ra7
- 2.Sxc3#
- 1...Ra8
- 2.Sxc3#
- 2.Qxa8#
- 1...Sxe1
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...c2
- 2.Sd2#
- 1...exd4
- 2.Qe6#
- 1...Rba2
- Tries
- 1.Sd2+?
- 1...Rxd2
- 2.d5#
- 1...cxd2!
- 1...Rxd2
- 1.Sxa3?
- threat
- 2.Qa8#
- 1...Sxe1
- 2.Re3#
- 1...exd4
- 2.Qe6#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Re3#
- 1...Rxb4!
- threat
- 1.Rc4?
- threat
- 2.d5#
- 1...Sxe1
- 2.Re3#
- 1...exd4
- 2.Qe6#
- 1...Ra4
- 2.Sxc3#
- 1...Se3
- 2.Rxe3#
- 1...Rb4!
- threat
- 1.Qc4?
- threat
- 2.Qc6#
- 2.d5#
- 1...Rxb4
- 2.Qc6#
- 1...Sxe1
- 2.Re3#
- 2.d5#
- 1...exd4
- 2.Qe6#
- 2.Qxd4#
- 1...Ra5
- 2.Sxc3#
- 2.d5#
- 1...Ra6
- 2.Sxc3#
- 2.d5#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Re3#
- 2.d5#
- 1...Ra8+!
- threat
- 1.Qe6?
- threat
- 2.Qxe5#
- 2.Qc6#
- 1...Sxe1
- 2.Re3#
- 1...Ra5
- 2.Sxc3#
- 1...Ra6
- 2.Sxc3#
- 2.Qxe5#
- 1...Se3
- 2.Rxe3#
- 2.Qxe5#
- 1...Sf4
- 2.Re3#
- 2.Qxe5#
- 1...Ra8+!
- threat
- 1.Qf7?
- threat
- 2.Qf3#
- 2.Qb7#
- 1...Rxb4
- 2.Qf3#
- 1...Sxe1
- 2.Re3#
- 1...exd4
- 2.Qe6#
- 2.Qf5#
- 1...Rf2
- 2.Qb7#
- 2.d5#
- 1...Ra5
- 2.Sxc3#
- 2.Qf3#
- 1...Ra6
- 2.Sxc3#
- 2.Qf3#
- 1...Ra7
- 2.Sxc3#
- 2.Qf3#
- 1...Se3
- 2.Rxe3#
- 2.Qf3#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 2.Qb7#
- 1...Ra8+!
- threat
- 1.Qe8?
- threat
- 2.Qc6#
- 2.Qxe5#
- 1...Kd5
- 2.dxe5#
- 1...Ra5
- 2.Sxc3#
- 1...Ra6
- 2.Sxc3#
- 2.Qxe5#
- 1...Ra8
- 2.Sxc3#
- 2.Qxa8#
- 1...Se3
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...Sxe1!
- threat
- 1.dxe5+?
- 1...Rxb4
- 2.Qd5#
- 1...Kxe5!
- 1...Rxb4
- 1.Sd2+?
- Keys
- 1.Qa2!
- 1...Ra8+
- 2.Qxa8#
- 1...Rxb1
- 2.Qxg2#
- 1...Rbxa2
- 2.d5#
- 1...Rxb4
- 2.Qxg2#
- 1...Raxa2
- 2.Sxc3#
- 1...Sxe1
- 2.Re3#
- 1...exd4
- 2.Qe6#
- 1...Rbb3
- 2.Qxg2#
- 1...Rab3
- 2.Qa8#
- 1...Rc2
- 2.d5#
- 1...Rd2
- 2.d5#
- 1...Re2
- 2.d5#
- 1...Rf2
- 2.d5#
- 1...Ra4
- 2.Sxc3#
- 1...Ra5
- 2.Sxc3#
- 1...Ra6
- 2.Sxc3#
- 1...Ra7
- 2.Sxc3#
- 1...Se3
- 2.Rxe3#
- 1...Sf4
- 2.Re3#
- 1...Sh4
- 2.Re3#
- 1...c2
- 2.Sd2#
- 1...Ra8+
- 1.Qa2!
This is a version
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(a);N_GUARD::R(F)+P(G)
- R(c);N_GUARD::S(A),XP(d)
- R(c);N_GUARD::QAB(J)
- S(b);N_GUARD,XS(B)::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD::R1(D)
- P(d);N_GUARD,S_CUTR(a)::S(A)
- P(f);OGATEB,P_SPINP(f),XP(G)::QAR2(J)
- Tries
- Try
- S(A);CHECK
- Vars
- R(a);XS(A)::R(F)+P(G)
- Refutation
- P(d);XS(A)
- Try
- S(A);XR(c)
- Threat
- QAB(J)
- Vars
- S(b);N_GUARD,XS(B)::R1(D)
- P(f);OGATEB,P_SPINP(f),XP(G)::QAR2(J)
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD::R1(D)
- Refutation
- R(a);XR(F)
- Try
- R(F);
- Threat
- R(F)+P(G)
- Vars
- S(b);N_GUARD,XS(B)::R1(D)
- P(f);OGATEB,P_SPINP(f),XP(G)::QAR2(J)
- R(c);N_GUARD::S(A),XP(d)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- R(a);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(a);XR(F)::QAB(J)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- R(c);CHECK
- Try
- Q(J);P_PINP(f)
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,XS(B)::R1(D)
- R(c);N_GUARD::S(A),XP(d)
- Refutation
- R(c);CHECK
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- R(a);XR(F)::QAB1(J)
- S(b);N_GUARD,XS(B)::R1(D)
- S(b);N_GUARD::R1(D)
- Refutation
- R(c);CHECK
- Try
- Q(J);P_PINP(f)
- Threat
- DUALS(2)
- Vars
- K(e);N_SPINP(f),S_FLIGHT::R(D)+P(G),XP(f)
- R(c);N_GUARD::S(A),XP(d)
- S(b);::QAR1(J),XP(f)
- Refutation
- S(b);XS(B)
- Try
- P(G);CHECK,XP(f)
- Vars
- R(a);XR(F)::QAB1(J)
- Refutation
- K(e);P-FLIGHT,XP(G)
- Try
- Actual
- Q(J);
- Vars
- R(c);CHECK,OGATE::QAB(J),XR(c)
- R(a);OGATE,XS(A)::QAB(J),XS(b)
- R(a);N_GUARD,XQ(J)::R(F)+P(G)
- R(a);OGATE,XR(F)::QAB(J),XS(b)
- R(c);N_GUARD,XQ(J)::S(A),XP(d)
- S(b);N_GUARD,XS(B)::R1(D)
- P(f);OGATEB,P_SPINP(f),XP(G)::QAR2(J)
- R(a);OGATE::QAB(J),XS(b)
- R(c);OGATE::QAB(J)
- R(a);N_GUARD::R(F)+P(G)
- R(c);N_GUARD::S(A),XP(d)
- S(b);N_GUARD::R1(D),XS(b)
- S(b);N_GUARD::R1(D)
- P(d);N_GUARD,S_CUTR(a)::S(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).