MESON Chess Problem Database
Problem Display
PID: 61948 (3Q1R2/2P4B/2K1N2n/2P2r2/2p1kB2/2n4R/2N3PP/6q1 w - - 0 1)
Touw Hian Bwee
2nd Prize, Mat, 1977
#2
12 + 6
| 261 | Mat | 1980 |
| 3750 | FIDE Album (1977-1979) | 1984 |
| 6352 | A Collection of Chess Problems by Touw Hian Bwee | 2008 |
SOLUTION
- SOUND
- Sets
- 1...Qxh2
- 2.Re3#
- 2.Qd4#
- 1...Qe3
- 2.Rxe3#
- 1...Qd4
- 2.Qxd4#
- 1...Qa1
- 2.Re3#
- 2.Qd4#
- 1...Qb1
- 2.Re3#
- 2.Qd4#
- 1...Qc1
- 2.Qd4#
- 1...Qd1
- 2.Re3#
- 1...Qe1
- 2.Qd4#
- 1...Qf1
- 2.Re3#
- 2.Qd4#
- 1...Qh1
- 2.Re3#
- 2.Qd4#
- 1...Qxg2
- 2.Re3#
- 2.Qd4#
- 1...Sb1
- 2.Qd5#
- 1...Sd1
- 2.Qd5#
- 1...Sa2
- 2.Qd5#
- 1...Se2
- 2.Qd5#
- 1...Sa4
- 2.Qd5#
- 1...Sb5
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sg4
- 2.Bxf5#
- 1...Sg8
- 2.Bxf5#
- 1...Qxh2
- Tries
- 1.Se3?
- threat
- 2.Qd4#
- 1...Qxe3
- 2.Rxe3#
- 1...Sd5
- 2.Qxd5#
- 1...Se2
- 2.Qd5#
- 1...Sb5
- 2.Qd5#
- 1...Qd1!
- threat
- 1.Bg3?
- threat
- 2.Sg5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qd4
- 2.Qxd4#
- 1...Sd5
- 2.Qxd5#
- 1...Qc1
- 2.Qd4#
- 1...Sf7
- 2.Rh4#
- 1...Qe3!
- threat
- 1.Bd6?
- threat
- 2.Sg5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxg2
- 2.Re3#
- 1...Qe3
- 2.Rxe3#
- 1...Sf7
- 2.Qh4#
- 1...Qc1!
- threat
- 1.Rxc3?
- threat
- 2.Qd5#
- 1...Qd4
- 2.Qxd4#
- 1...Qd1
- 2.Re3#
- 1...Qxc5+!
- threat
- 1.Rf3?
- threat
- 2.Sg5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxg2
- 2.Re3#
- 1...Sf7!
- threat
- 1.Rh4?
- threat
- 2.Sg5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qd4
- 2.Qxd4#
- 1...Sd5
- 2.Qxd5#
- 1...Sg4
- 2.Bxf5#
- 1...Sf7
- 2.Bg3#
- 1...Qxg2!
- threat
- 1.Rxf5?
- threat
- 2.Sg5#
- 2.Re5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxg2
- 2.Re3#
- 2.Re5#
- 2.Qd4#
- 1...Sf7
- 2.Rd5#
- 2.Re5#
- 2.Rg5#
- 2.Rfh5#
- 2.Rf6#
- 2.Rxf7#
- 1...Sxf5!
- threat
- 1.Qf6?
- threat
- 2.Qe5#
- 1...Qe3
- 2.Rxe3#
- 1...Qd4
- 2.Qxd4#
- 1...Sg4
- 2.Bxf5#
- 2.Qxf5#
- 1...Sf7
- 2.Bxf5#
- 2.Qxf5#
- 1...Qxc5+!
- threat
- 1.Qd2?
- threat
- 2.Sg5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxg2
- 2.Re3#
- 2.Qe3#
- 2.Qxg2#
- 2.Qd4#
- 1...Qe3
- 2.Rxe3#
- 2.Qxe3#
- 1...Sf7!
- threat
- 1.Qd6?
- threat
- 2.Sg5#
- 2.Qe5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxg2
- 2.Re3#
- 2.Qe5#
- 2.Qd4#
- 1...Qe3
- 2.Sg5#
- 2.Rxe3#
- 1...Qd4
- 2.Sg5#
- 2.Qxd4#
- 1...Sg4
- 2.Sg5#
- 2.Bxf5#
- 1...Sf7!
- threat
- 1.Se3?
- Keys
- 1.Qh4!
- threat
- 2.Sg5#
- 1...Qxc5+
- 2.Sxc5#
- 1...Qxg2
- 2.Re3#
- 1...Qe3
- 2.Rxe3#
- 1...Sg4
- 2.Bxf5#
- 1...Sf7
- 2.Bd6#
- threat
- 1.Qh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD::R1(D),XQ(a)
- Q(a);N_GUARD::QAR1(K),XQ(a)
- Q(a);N_GUARD::QAR1(K)
- Q(a);N_GUARD::R1(D)
- S(b);N_GUARD::QAB1(K)
- S(b);N_GUARD::QAB1(K),XS(b)
- S(f);N_GUARD::B(J),XR(e)
- Tries
- Try
- S(A);
- Threat
- QAR1(K)
- Vars
- Q(a);OGATE,XS(A)::R1(D),XQ(a)
- S(b);N_GUARD::QAB1(K),XS(b)
- S(b);N_GUARD::QAB1(K)
- Refutation
- Q(a);
- Try
- B(E);
- Threat
- S(H)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Q(a);N_GUARD::QAR1(K),XQ(a)
- S(b);N_GUARD::QAB1(K),XS(b)
- Q(a);N_GUARD::QAR1(K)
- S(f);N_GUARD::R(D)
- Refutation
- Q(a);
- Try
- B(E);
- Threat
- S(H)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Q(a);N_GUARD,XP(B)::R1(D)
- Q(a);N_GUARD::R1(D),XQ(a)
- S(f);N_GUARD::QAR(K)
- Refutation
- Q(a);
- Try
- R(D);XS(b)
- Threat
- QAB1(K)
- Vars
- Q(a);N_GUARD::QAR1(K),XQ(a)
- Q(a);N_GUARD::R1(D)
- Refutation
- Q(a);CHECK,XP(F)
- Try
- R(D);
- Threat
- S(H)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Q(a);N_GUARD,XP(B)::R1(D)
- Refutation
- S(f);
- Try
- R(D);
- Threat
- S(H)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Q(a);N_GUARD::QAR1(K),XQ(a)
- S(b);N_GUARD::QAB1(K),XS(b)
- S(f);N_GUARD::B(J),XR(e)
- S(f);N_GUARD::R(D)+B(E)
- Refutation
- Q(a);XP(B)
- Try
- R(L);XR(e)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Refutation
- S(f);P_SPINS(f),XR(L)
- Try
- Q(K);
- Threat
- QAR1(K)
- Vars
- Q(a);N_GUARD::R1(D),XQ(a)
- Q(a);N_GUARD::QAR1(K),XQ(a)
- Refutation
- Q(a);CHECK,XP(F)
- Try
- Q(K);
- Threat
- S(H)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Refutation
- S(f);
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Refutation
- S(f);
- Try
- Actual
- Q(K);
- Threat
- S(H)
- Vars
- Q(a);CHECK,XP(F)::S(H),XQ(a)
- Q(a);N_GUARD,XP(B)::R1(D)
- Q(a);N_GUARD::R1(D),XQ(a)
- S(f);N_GUARD::B(J),XR(e)
- S(f);N_GUARD::QAR(K)+B(E)
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).