MESON Chess Problem Database
Problem Display
PID: 197734 (2b1Q1n1/5r2/2P1p2n/1NPkBpP1/BKR2p1q/pp4rN/8/4R1b1 w - - 0 1)
Doukhan, Gerard
The Problemist, 1981
#2
11 + 13
SOLUTION
- SOUND
- Sets
- 1...Qh5
- 2.Sxf4#
- 1...Rg2
- 2.Sc3#
- 1...Rc3
- 2.Sxc3#
- 1...Rg4
- 2.Sc3#
- 1...Rxg5
- 2.Sc3#
- 1...Rf6
- 2.Sc7#
- 1...Rc7
- 2.Sxc7#
- 1...Rf8
- 2.Sc7#
- 1...Bh2
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 1...Bxc5+
- 2.Rxc5#
- 1...Bd7
- 2.Sc7#
- 1...Sg4
- 2.Sxf4#
- 1...Se7
- 2.Sc7#
- 1...f3
- 2.Sc3#
- 1...Qh5
- Tries
- 1.Bd4?
- threat
- 2.Re5#
- 1...Bxd4
- 2.Rxd4#
- 1...Rd7
- 2.Qxe6#
- 1...Be3
- 2.Sc3#
- 1...Bd7
- 2.Sc7#
- 1...Sg4
- 2.Sxf4#
- 1...e5
- 2.Rxe5#
- 1...Re3!
- threat
- 1.Bxf4?
- threat
- 2.Re5#
- 1...Bxc5+
- 2.Rxc5#
- 1...Qxf4
- 2.Sxf4#
- 1...Rd7
- 2.Qxe6#
- 1...Bd7
- 2.Sc7#
- 1...Re3
- 2.Rd4#
- 1...Be3
- 2.Sc3#
- 1...Bd4
- 2.Rxd4#
- 1...e5
- 2.Rxe5#
- 1...Sg4!
- threat
- 1.Bd6?
- threat
- 2.Re5#
- 1...Bxc5+
- 2.Rxc5#
- 1...Bd7
- 2.Sc7#
- 1...Re3
- 2.Rd4#
- 1...Be3
- 2.Sc3#
- 1...Bd4
- 2.Rxd4#
- 1...Sg4
- 2.Sxf4#
- 1...e5
- 2.Rxe5#
- 1...Rd7!
- threat
- 1.Bf6?
- threat
- 2.Re5#
- 1...Bxc5+
- 2.Rxc5#
- 1...Rxf6
- 2.Sc7#
- 1...Rd7
- 2.Qxe6#
- 1...Bd7
- 2.Sc7#
- 1...Re3
- 2.Rd4#
- 1...Be3
- 2.Sc3#
- 1...Bd4
- 2.Rxd4#
- 1...Sg4
- 2.Sxf4#
- 1...e5
- 2.Rxe5#
- 1...Sxf6!
- threat
- 1.Bc7?
- threat
- 2.Re5#
- 1...Bxc5+
- 2.Rxc5#
- 1...Rxc7
- 2.Sxc7#
- 1...Rd7
- 2.Qxe6#
- 1...Re3
- 2.Rd4#
- 1...Be3
- 2.Sc3#
- 1...Bd4
- 2.Rxd4#
- 1...Sg4
- 2.Sxf4#
- 1...e5
- 2.Rxe5#
- 1...Bd7!
- threat
- 1.Qd7+?
- 1...Bxd7
- 2.Sc7#
- 1...Rxd7!
- 1...Bxd7
- 1.Qe7?
- threat
- 2.Sc7#
- 2.Qd6#
- 1...Bxc5+
- 2.Rxc5#
- 2.Qxc5#
- 1...Kxc6
- 2.Sc3#
- 1...Sxe7
- 2.Sc7#
- 1...Re3
- 2.Qd6#
- 1...Be3
- 2.Qd6#
- 1...Rxe7!
- threat
- 1.Qd8+?
- 1...Rd7
- 2.Sc7#
- 1...Bd7
- 2.Sc7#
- 1...Kxc6!
- 1...Rd7
- 1.Bd4?
- Keys
- 1.Bb8!
- threat
- 2.Re5#
- 1...Bxc5+
- 2.Rxc5#
- 1...Rd7
- 2.Qxe6#
- 1...Bd7
- 2.Sc7#
- 1...Re3
- 2.Rd4#
- 1...Rc7
- 2.Sxc7#
- 1...Be3
- 2.Sc3#
- 1...Bd4
- 2.Rxd4#
- 1...Sg4
- 2.Sxf4#
- 1...e5
- 2.Rxe5#
- threat
- 1.Bb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 10
- Sets
- Q(f);N_GUARD::S(B),XP(e)
- R(d);N_GUARD::S(F)
- R(d);N_GUARD::S(F),XR(d)
- R(d);N_GUARD,XP(I)::S(F)
- R(k);N_GUARD::S(F)
- R(k);N_GUARD::S(F),XR(k)
- B(a);N_GUARD::R1(E)
- B(a);N_GUARD::R1(E),XB(a)
- B(a);CHECK,OGATE,XP(G)::R1(E),XB(a)
- B(l);S_CUTR(k)::S(F)
- S(j);S_CUTQ(f)::S(B),XP(e)
- S(m);S_CUTR(k)::S(F)
- P(e);P_PINR(E),S_CUTR(d)::S(F)
- Tries
- Try
- B(H);
- Threat
- R1(A)
- Vars
- B(a);OGATE,XB(H)::R1(E),XB(a)
- R(k);S_CUTB(l)::QAB1(K),XP(i)
- B(a);S_CUTR(d)::S(F)
- B(l);S_CUTR(k)::S(F)
- S(j);S_CUTQ(f)::S(B),XP(e)
- P(i);::R1(A),XP(i)
- Refutation
- R(d);
- Try
- B(H);XP(e)
- Threat
- R1(A)
- Vars
- B(a);CHECK,OGATE,XP(G)::R1(E),XB(a)
- Q(f);P_PINR(E),XB(H)::S(B),XQ(f)
- R(k);S_CUTB(l)::QAB1(K),XP(i)
- B(l);S_CUTR(k)::S(F)
- R(d);S_CUTB(a)::R1(E)
- B(a);S_CUTR(d)::S(F)
- B(a);N_GUARD::R1(E),XB(a)
- P(i);::R1(A),XP(i)
- Refutation
- S(j);
- Try
- B(H);
- Threat
- R1(A)
- Vars
- B(a);CHECK,OGATE,XP(G)::R1(E),XB(a)
- B(l);S_CUTR(k)::S(F)
- R(d);S_CUTB(a)::R1(E)
- B(a);S_CUTR(d)::S(F)
- B(a);N_GUARD::R1(E),XB(a)
- S(j);S_CUTQ(f)::S(B),XP(e)
- P(i);::R1(A),XP(i)
- Refutation
- R(k);
- Try
- B(H);
- Threat
- R1(A)
- Vars
- B(a);CHECK,OGATE,XP(G)::R1(E),XB(a)
- R(k);N_GUARD,XB(H)::S(F)
- R(k);S_CUTB(l)::QAB1(K),XP(i)
- B(l);S_CUTR(k)::S(F)
- R(d);S_CUTB(a)::R1(E)
- B(a);S_CUTR(d)::S(F)
- B(a);N_GUARD::R1(E),XB(a)
- S(j);S_CUTQ(f)::S(B),XP(e)
- P(i);::R1(A),XP(i)
- Refutation
- S(m);XB(H)
- Try
- B(H);
- Threat
- R1(A)
- Vars
- B(a);CHECK,OGATE,XP(G)::R1(E),XB(a)
- R(k);XB(H)::S(F),XR(k)
- R(k);S_CUTB(l)::QAB1(K),XP(i)
- R(d);S_CUTB(a)::R1(E)
- B(a);S_CUTR(d)::S(F)
- B(a);N_GUARD::R1(E),XB(a)
- S(j);S_CUTQ(f)::S(B),XP(e)
- P(i);::R1(A),XP(i)
- Refutation
- B(l);
- Try
- Q(K);CHECK
- Vars
- B(l);XQ(K)::S(F)
- Refutation
- R(k);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- K(g);S_FLIGHT,XP(J)::B(C)+S(F)
- S(m);XQ(K)::S(F)
- R(d);::QAR1(K)
- B(a);::QAR1(K)
- Refutation
- R(k);XQ(K)
- Try
- Q(K);CHECK
- Vars
- R(k);P_SPINR(k)::S(F)
- B(l);P_SPINB(l)::S(F)
- Refutation
- K(g);S_FLIGHT,XP(J)
- Try
- Actual
- B(H);
- Threat
- R1(A)
- Vars
- B(a);CHECK,OGATE,XP(G)::R1(E),XB(a)
- R(k);S_CUTB(l)::QAB1(K),XP(i)
- B(l);S_CUTR(k)::S(F)
- R(d);S_CUTB(a)::R1(E)
- R(k);N_GUARD::S(F),XR(k)
- B(a);S_CUTR(d)::S(F)
- B(a);N_GUARD::R1(E),XB(a)
- S(j);S_CUTQ(f)::S(B),XP(e)
- P(i);::R1(A),XP(i)
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).