MESON Chess Problem Database
Problem Display
PID: 12397 (q2r3b/3r4/4n3/pR3QPB/2k2p1K/PNp4R/1PNPb3/n5B1 w - - 0 1)
Keller, Michael
1st Prize, Themes-64, 1978
#2
12 + 11
| 3750 | FIDE Album (1977-1979) | 1984 |
| 4655 | Michael Keller Ein Meister der Schachkomposition | 1994 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Sxa5#
- 1...Qg2
- 2.Sxa5#
- 1...Qf3
- 2.Sxa5#
- 1...Qe4
- 2.Sxa5#
- 1...Qc6
- 2.Sxa5#
- 1...Qb7
- 2.Sxa5#
- 1...Qb8
- 2.Sxa5#
- 1...Qc8
- 2.Sxa5#
- 1...Rd4
- 2.Rxc3#
- 1...Rg7
- 2.Rxc3#
- 1...Bd4
- 2.Bxe2#
- 1...Sd4
- 2.Rxc3#
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sxg5
- 2.Qc5#
- 1...Sc7
- 2.Qc5#
- 1...Sg7
- 2.Rxc3#
- 2.Qc5#
- 1...Sf8
- 2.Qc5#
- 1...f3
- 2.Se3#
- 1...a4
- 2.Rb4#
- 1...Qh1
- Tries
- 1.Scd4?
- threat
- 2.Bxe2#
- 2.Rxc3#
- 1...Rxd4
- 2.Rxc3#
- 1...Bxh5
- 2.Rxc3#
- 2.Qd3#
- 2.d3#
- 1...Bxd4
- 2.Bxe2#
- 1...Sxd4
- 2.Rxc3#
- 2.Qc5#
- 1...cxb2
- 2.Bxe2#
- 2.Rc3#
- 1...cxd2
- 2.Sxd2#
- 2.Bxe2#
- 2.Rc3#
- 1...Qh1
- 2.Sxa5#
- 2.Bxe2#
- 1...Qg2
- 2.Sxa5#
- 2.Rxc3#
- 1...Qf3
- 2.Sxa5#
- 1...Qe4
- 2.Sxa5#
- 2.Rxc3#
- 1...Rh7
- 2.Rxc3#
- 1...Bd1
- 2.Rxc3#
- 2.Qd3#
- 2.d3#
- 1...Bf1
- 2.Rxc3#
- 1...Bd3
- 2.Qxd3#
- 1...Bf3
- 2.d3#
- 1...Bg4
- 2.Rxc3#
- 2.Qd3#
- 2.d3#
- 1...Sc5
- 2.Rxc3#
- 2.Rxc5#
- 2.Qxc5#
- 1...c2
- 2.Bxe2#
- 2.Rc3#
- 1...f3!
- threat
- 1.Qxe6+?
- 1...Qd5
- 2.Bxe2#
- 1...Rd5
- 2.Bxe2#
- 1...Kxb5!
- 1...Qd5
- 1.d4?
- threat
- 2.Bxe2#
- 2.Rxc3#
- 1...Rxd4
- 2.Rxc3#
- 1...Bxh5
- 2.Rxc3#
- 2.Qd3#
- 1...Bxd4
- 2.Bxe2#
- 1...Sxd4
- 2.Rxc3#
- 2.Qc5#
- 1...cxb2
- 2.Sd2#
- 2.Bxe2#
- 1...Qd5
- 2.Bxe2#
- 1...Rd5
- 2.Bxe2#
- 1...Be5
- 2.Bxe2#
- 1...Sc5
- 2.Qxc5#
- 1...f3
- 2.Se3#
- 1...Qh1
- 2.Sxa5#
- 2.Bxe2#
- 1...Qg2
- 2.Sxa5#
- 2.Rxc3#
- 1...Qf3
- 2.Sxa5#
- 1...Qe4
- 2.Sxa5#
- 2.Rxc3#
- 1...Rh7
- 2.Rxc3#
- 1...Bd1
- 2.Rxc3#
- 2.Qd3#
- 1...Bf1
- 2.Rxc3#
- 1...Bd3
- 2.Qxd3#
- 1...Bg4
- 2.Rxc3#
- 2.Qd3#
- 1...Bf3!
- threat
- 1.Scd4?
- Keys
- 1.Bd4!
- threat
- 2.Bxe2#
- 2.Rxc3#
- 1...Rxd4
- 2.Rxc3#
- 1...Bxh5
- 2.Rxc3#
- 2.Qd3#
- 2.d3#
- 1...Bxd4
- 2.Bxe2#
- 1...Sxd4
- 2.Rxc3#
- 2.Qc5#
- 1...cxb2
- 2.Bxe2#
- 2.Rc3#
- 1...cxd2
- 2.Sxd2#
- 2.Bxe2#
- 2.Rc3#
- 1...Qd5
- 2.Bxe2#
- 1...Rd5
- 2.Bxe2#
- 1...Be5
- 2.Bxe2#
- 1...Sc5
- 2.Qxc5#
- 1...f3
- 2.Se3#
- 1...Qh1
- 2.Sxa5#
- 2.Bxe2#
- 1...Qg2
- 2.Sxa5#
- 2.Rxc3#
- 1...Qf3
- 2.Sxa5#
- 1...Qe4
- 2.Sxa5#
- 2.Rxc3#
- 1...Rh7
- 2.Rxc3#
- 1...Bd1
- 2.Rxc3#
- 2.Qd3#
- 2.d3#
- 1...Bf1
- 2.Rxc3#
- 1...Bd3
- 2.Qxd3#
- 1...Bf3
- 2.d3#
- 1...Bg4
- 2.Rxc3#
- 2.Qd3#
- 2.d3#
- threat
- 1.Bd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 12
- Sets
- Q(i);N_GUARD,P_PINR(G)::S(F),XP(f)
- Q(i);N_GUARD::S(F),XP(f)
- R(h);S_CUTB(k)::R1(G),XP(c)
- B(k);S_CUTR(h)::B(L),XB(b)
- S(g);N_GUARD::QAR1(J),XS(g)
- S(g);N_GUARD,XP(K)::QAR1(J)
- S(g);N_GUARD::QAR1(J)
- P(e);N_GUARD::S(C)
- P(f);N_GUARD::R1(I)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(h);XS(C)::R1(G),XP(c)
- B(k);XS(C)::B(L),XB(b)
- Q(i);N_GUARD::S(F),XP(f)
- R(h);P_PINB(L)::R1(G),XP(c)
- B(b);::R1(G),XP(c)
- B(b);N_GUARD::QAB1(J),XB(b)
- B(b);N_GUARD::P(D)
- Refutation
- P(e);
- Try
- Q(J);CHECK,XS(g)
- Vars
- Q(i);P_SPINQ(i)::B(L),XB(b)
- R(h);P_SPINR(h)::B(L),XB(b)
- Refutation
- K(d);S_FLIGHT,XR(I)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- R(h);XP(D)::R1(G),XP(c)
- B(k);XP(D)::B(L),XB(b)
- Q(i);::B(L),XB(b)
- R(h);::B(L),XB(b)
- B(k);::B(L),XB(b)
- S(g);N_GUARD::QAR1(J),XS(g)
- P(e);N_GUARD::S(C)
- Q(i);N_GUARD::S(F),XP(f)
- R(h);P_PINB(L)::R1(G),XP(c)
- B(b);::R1(G),XP(c)
- B(b);N_GUARD::QAB1(J),XB(b)
- Refutation
- B(b);
- Try
- Actual
- B(A);
- Threat
- DUALS(2)
- Vars
- R(h);XB(A)::R1(G),XP(c)
- B(k);XB(A)::B(L),XB(b)
- Q(i);::B(L),XB(b)
- R(h);::B(L),XB(b)
- B(k);::B(L),XB(b)
- S(g);N_GUARD::QAR1(J),XS(g)
- P(e);N_GUARD::S(C)
- Q(i);N_GUARD::S(F),XP(f)
- R(h);P_PINB(L)::R1(G),XP(c)
- B(b);::R1(G),XP(c)
- B(b);N_GUARD::QAB1(J),XB(b)
- B(b);N_GUARD::P(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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