MESON Chess Problem Database
Problem Display
PID: 103834 (2R1R2B/2P1N1n1/K2p1r2/n3kPP1/4N1p1/1pP5/5QBq/8 w - - 0 1)
Alkaff, Muchsin
Tan Hien Yan
Olympic Ty., 1964
#2
12 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qg3#
- 1...Qg3
- 2.Qxg3#
- 1...Qf4
- 2.Qd4#
- 1...Qh1
- 2.Qg3#
- 1...Qh5
- 2.Qg3#
- 1...Qh6
- 2.Qg3#
- 1...Qh7
- 2.Qg3#
- 1...Qxh8
- 2.Qg3#
- 1...Rxf5
- 2.Qxf5#
- 1...Sxf5
- 2.Qxf5#
- 1...Se6
- 2.Bxf6#
- 1...d5+
- 2.Sc6#
- 1...Qg1
- Tries
- 1.Sg3?
- threat
- 2.Sc6#
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...Qxg3
- 2.Sc6#
- 2.Sg6#
- 2.Qxg3#
- 2.Qd4#
- 1...Qxg2
- 2.Qd4#
- 1...Rxf5
- 2.Sd5#
- 2.Sexf5#
- 2.Sc6#
- 2.Sg6#
- 2.Sg8#
- 2.Qe3#
- 2.Qxf5#
- 1...Sxf5
- 2.Sexf5#
- 2.Sc6#
- 2.Sg6#
- 2.Qxf5#
- 1...Sxe8
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...Qg1
- 2.Sc6#
- 2.Sg6#
- 1...Re6
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...Rg6
- 2.Sc6#
- 2.Sxg6#
- 2.Qe3#
- 2.Qd4#
- 1...Sc4
- 2.Sc6#
- 2.Sg6#
- 2.Qd4#
- 1...Sc6
- 2.Sxc6#
- 2.Sg6#
- 2.Qe3#
- 1...Se6
- 2.Sg6#
- 2.Bxf6#
- 2.Qe3#
- 1...d5+!
- threat
- 1.Sxf6?
- threat
- 2.Sxg4#
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...Qxg2
- 2.Sc6#
- 2.Sg6#
- 2.Qd4#
- 1...Sxf5
- 2.Sxf5#
- 2.Sc6#
- 2.Sg6#
- 2.Qxf5#
- 1...Sxe8
- 2.Sxg4#
- 2.Sd7#
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...Qg1
- 2.Sxg4#
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qg3#
- 1...Qg3
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qxg3#
- 2.Qd4#
- 1...Qf4
- 2.Sd7#
- 1...Qh3
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qd4#
- 1...Qh4
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...Qh5
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qe3#
- 2.Qg3#
- 2.Qd4#
- 1...Sc4
- 2.Sxg4#
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qd4#
- 1...Sc6
- 2.Sxg4#
- 2.Sd7#
- 2.Sxc6#
- 2.Sg6#
- 2.Qe3#
- 1...Se6
- 2.Sxg4#
- 2.Sd7#
- 2.Sg6#
- 2.Qe3#
- 1...g3
- 2.Sg4#
- 2.Sd7#
- 2.Sc6#
- 2.Sg6#
- 2.Qe3#
- 2.Qd4#
- 1...d5!
- threat
- 1.Bxg7?
- threat
- 2.Bxf6#
- 1...Qh6
- 2.Qg3#
- 1...Qh8
- 2.Qg3#
- 1...Qxg2!
- threat
- 1.c4?
- threat
- 2.Sc6#
- 2.Sg6#
- 1...d5+
- 2.Sc6#
- 1...Sxe8
- 2.Sg6#
- 1...Re6
- 2.Sg6#
- 1...Qf4
- 2.Qb2#
- 1...Rg6
- 2.Sc6#
- 2.Sxg6#
- 1...Sc6
- 2.Sxc6#
- 2.Sg6#
- 1...Se6
- 2.Sg6#
- 2.Bxf6#
- 1...Sxc4!
- threat
- 1.Sg3?
- Keys
- 1.Sxd6!
- threat
- 2.Qd4#
- 1...Rxd6+
- 2.Sc6#
- 1...Kxd6
- 2.Qd4#
- 1...Rxf5
- 2.Sexf5#
- 1...Sxf5
- 2.Sxf5#
- 1...Qg1
- 2.Qg3#
- 1...Qf4
- 2.Qc5#
- 1...Sc6
- 2.Sc4#
- 1...Se6
- 2.Sf7#
- threat
- 1.Sxd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- Q(a);N_GUARD::QAB(A)
- Q(a);N_GUARD::QAB(A),XQ(a)
- Q(a);SBLOCK::QAB1(A)
- Q(a);N_GUARD,XB(L)::QAB(A)
- R(g);OGATE,P_SPINS(h),XP(E)::QAR1(A),XR(g)
- S(h);OGATE,P_SPINR(g),XP(E)::QAR1(A),XS(h)
- S(h);OGATE,P_SPINR(g)::B(L),XR(g)
- P(f);CHECK,SBLOCK::R(K)+S(I),DCHECK
- Tries
- Try
- S(D);
- Threat
- DUALS(4)
- Vars
- Q(a);XB(B)::QAB1(A)
- Refutation
- P(f);CHECK
- Try
- S(D);XR(g)
- Threat
- DUALS(6)
- Vars
- Q(a);::S(D)
- Refutation
- P(f);
- Try
- B(L);P_PINR(g),XS(h)
- Threat
- B(L),XR(g)
- Vars
- Q(a);N_GUARD::QAB(A)
- Refutation
- Q(a);XB(B)
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- P(f);CHECK::R(K)+S(I),DCHECK
- S(h);P_SPINR(g),XR(K)::S(I)
- R(g);P_SPINS(h)::S(I)
- Q(a);SBLOCK::QAB(A)
- Refutation
- S(d);XP(C)
- Try
- Actual
- S(D);P_SPINS(D),XP(f)
- Threat
- QAB1(A)
- Vars
- R(g);CHECK,P_SPINS(h),SBLOCK,XS(D)::R(K)+S(I),DCHECK
- K(e);S_FLIGHT,XS(D)::QAR2(A)
- R(g);N_PINS(D),P_SPINS(h),XP(E)::R(K)+S(I),XR(g)
- S(h);P_SPINR(g),XP(E)::R(K)+S(I),XS(h)
- Q(a);N_GUARD::QAB(A)
- Q(a);SBLOCK::QAR2(A)
- S(d);N_PINS(D)::S(D)
- S(h);N_PINS(D),P_SPINR(g)::S(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).