MESON Chess Problem Database
Problem Display
PID: 33331 (1r1RnK2/3qp3/b1r2p2/b1p4R/1Q1BNP2/3k4/3N1P2/3B4 w - - 0 1)
Keller, Michael
Zidek, Alexander
Schach-Aktiv, 1987
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qh3
- 2.Rxh3#
- 1...Qxd4
- 2.Rh3#
- 1...Qd5
- 2.Rh3#
- 1...Qd6
- 2.Rh3#
- 1...Qa7
- 2.Rh3#
- 1...Qb7
- 2.Rh3#
- 1...Qc7
- 2.Rh3#
- 1...Qxd8
- 2.Rh3#
- 1...Rcb6
- 2.Sxc5#
- 1...Rd6
- 2.Sxc5#
- 1...Re6
- 2.Sxc5#
- 2.Rh3#
- 1...Rb5
- 2.Qc4#
- 1...Bb6
- 2.Qc3#
- 1...Bc7
- 2.Qc3#
- 1...Bxd8
- 2.Qc3#
- 1...Bc4
- 2.Qxc4#
- 1...Bb7
- 2.Qc4#
- 1...Bc8
- 2.Qc4#
- 1...f5
- 2.Rh3#
- 1...e6
- 2.Rh3#
- 1...Qh3
- Tries
- 1.Bb2?
- threat
- 2.Rh3#
- 1...Bxd8
- 2.Qc3#
- 1...Rd6
- 2.Sxc5#
- 1...Sd6
- 2.Rd5#
- 1...Rxd8!
- threat
- 1.Bc3?
- threat
- 2.Rh3#
- 1...Rxd8
- 2.Qb1#
- 1...Rd6
- 2.Sxc5#
- 1...Sd6
- 2.Rd5#
- 1...Bxd8!
- threat
- 1.Bxc5?
- threat
- 2.Rh3#
- 1...Rxd8
- 2.Qb1#
- 1...Bxd8
- 2.Qc3#
- 1...Sd6
- 2.Rd5#
- 2.Qd4#
- 1...Rd6!
- threat
- 1.Be5?
- threat
- 2.Rh3#
- 1...Rxd8
- 2.Qb1#
- 1...Bxd8
- 2.Qc3#
- 1...Rd6
- 2.Sxc5#
- 1...Sd6!
- threat
- 1.Bxf6?
- threat
- 2.Rh3#
- 1...Rxd8
- 2.Qb1#
- 1...Bxd8
- 2.Qc3#
- 1...Rd6
- 2.Sxc5#
- 1...Sd6
- 2.Rd5#
- 1...Rxf6+!
- threat
- 1.Qa3+?
- 1...Kxd4
- 2.Qe3#
- 1...Bc3
- 2.Qxc3#
- 1...Rb3!
- 1...Kxd4
- 1.Qb3+?
- 1...Kxd4
- 2.Qe3#
- 1...Bc3
- 2.Qxc3#
- 1...Rxb3!
- 1...Kxd4
- 1.Bb2?
- Keys
- 1.Ba1!
- threat
- 2.Rh3#
- 1...Rxd8
- 2.Qb1#
- 1...Bxd8
- 2.Qc3#
- 1...Rd6
- 2.Sxc5#
- 1...Sd6
- 2.Rd5#
- threat
- 1.Ba1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 17
- Sets
- Q(g);N_GUARD::R(H),XQ(g)
- Q(g);N_GUARD,P_SPINQ(g),XB(E)::R(H)
- Q(g);N_GUARD::R(H)
- Q(g);N_GUARD,XR(I)::R(H)
- R(e);N_GUARD::S(F),XP(c)
- R(i);S_CUTB(d)::QAB1(D)
- B(b);N_GUARD::QAR1(D)
- B(b);N_GUARD,XR(I)::QAR1(D)
- B(d);N_GUARD::QAB1(D),XB(d)
- B(d);N_GUARD::QAB1(D)
- P(f);S_CUTQ(g)::R(H)
- P(h);S_CUTQ(g)::R(H)
- Tries
- Try
- B(E);P_PINQ(g)
- Threat
- R(H)
- Vars
- B(b);N_GUARD,N_SPINQ(g),XR(I)::QAR1(D)
- R(e);N_GUARD,N_SPINQ(g)::S(F),XP(c)
- S(j);N_SPINQ(g),P_PINR(I),S_CUTQ(g)::R(H)
- Refutation
- R(i);N_SPINQ(g),XR(I)
- Try
- B(E);P_PINQ(g)
- Threat
- R(H)
- Vars
- R(i);N_GUARD,N_SPINQ(g),XR(I)::QAB(D)
- R(e);N_GUARD,N_SPINQ(g)::S(F),XP(c)
- S(j);N_SPINQ(g),P_PINR(I),S_CUTQ(g)::R(H)
- Refutation
- B(b);N_SPINQ(g),XR(I)
- Try
- B(E);P_PINQ(g),XP(c)
- Threat
- R(H)
- Vars
- R(i);N_GUARD,N_SPINQ(g),XR(I)::QAB(D)
- B(b);N_GUARD,N_SPINQ(g),XR(I)::QAR1(D)
- Refutation
- R(e);N_SPINQ(g)
- Try
- B(E);P_PINQ(g)
- Threat
- R(H)
- Vars
- R(i);N_GUARD,N_SPINQ(g),XR(I)::QAB(D)
- B(b);N_GUARD,N_SPINQ(g),XR(I)::QAR1(D)
- R(e);N_GUARD,N_SPINQ(g)::S(F),XP(c)
- Refutation
- S(j);N_SPINQ(g),P_PINR(I)
- Try
- B(E);P_PINQ(g),XP(f)
- Threat
- R(H)
- Vars
- R(i);N_GUARD,N_SPINQ(g),XR(I)::QAB(D)
- B(b);N_GUARD,N_SPINQ(g),XR(I)::QAR1(D)
- R(e);N_GUARD,N_SPINQ(g)::S(F),XP(c)
- S(j);N_SPINQ(g),P_PINR(I),S_CUTQ(g)::R(H)
- Refutation
- R(e);CHECK,XB(E)
- Try
- Q(D);CHECK
- Vars
- K(a);OGATE,P-FLIGHT,P_SPINQ(g),XB(E)::QAB1(D)
- B(b);N_GUARD,P_SPINB(b)::QAR1(D),XB(b)
- Refutation
- R(i);P_SPINR(i)
- Try
- Q(D);CHECK
- Vars
- K(a);OGATE,P-FLIGHT,P_SPINQ(g),XB(E)::QAB1(D)
- B(b);N_GUARD,P_SPINB(b)::QAR1(D),XB(b)
- Refutation
- R(i);XQ(D)
- Try
- Actual
- B(E);P_PINQ(g)
- Threat
- R(H)
- Vars
- R(i);N_GUARD,N_SPINQ(g),XR(I)::QAB(D)
- B(b);N_GUARD,N_SPINQ(g),XR(I)::QAR1(D)
- R(e);N_GUARD,N_SPINQ(g)::S(F),XP(c)
- S(j);N_SPINQ(g),P_PINR(I),S_CUTQ(g)::R(H)
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).