MESON Chess Problem Database
Problem Display
PID: 45883 (B4R2/2b5/4n3/1pqR3r/2n1k2P/pQB4N/1P3pP1/1b3N1K w - - 0 1)
Einat, Paz
The Problemist, 1980
#2
11 + 10
| 3841 | The Art of Israeli Chess Composition | 1983 |
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Sxf2#
- 1...Qd6
- 2.Sxf2#
- 1...Qe7
- 2.Sxf2#
- 1...Qxd5
- 2.Sxf2#
- 1...Re5
- 2.Rd4#
- 1...Ba2
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Re5#
- 1...Be5
- 2.Rd4#
- 1...Se3
- 2.Sd2#
- 2.Sxf2#
- 1...Se5
- 2.Rd4#
- 1...Sd4
- 2.Sxf2#
- 1...Qb4
- Tries
- 1.Sg3+?
- 1...Ke3
- 2.Bd2#
- 2.Rf3#
- 1...Bxg3!
- 1...Ke3
- 1.Be5?
- threat
- 2.Sg3#
- 2.Rxc5#
- 2.Qf3#
- 1...Qxf8
- 2.Sg3#
- 1...Rxe5
- 2.Sg3#
- 2.Qf3#
- 1...Bxe5
- 2.Qf3#
- 1...Sxe5
- 2.Sd2#
- 2.Sg3#
- 1...Sxf8
- 2.Sg3#
- 2.Qf3#
- 1...Qc6
- 2.Qf3#
- 1...Qe3
- 2.Rxb5#
- 2.Rc5#
- 1...Qb4
- 2.Sg3#
- 2.Sxf2#
- 2.Rxb5#
- 2.Rc5#
- 2.Qf3#
- 1...Qd4
- 2.Sg3#
- 2.Qf3#
- 1...Qb6
- 2.Sg3#
- 2.Qf3#
- 1...Qd6
- 2.Sg3#
- 2.Sxf2#
- 2.Qf3#
- 1...Qa7
- 2.Sg3#
- 2.Qf3#
- 1...Qe7
- 2.Sg3#
- 2.Sxf2#
- 2.Rxb5#
- 2.Rc5#
- 2.Qf3#
- 1...Rf5
- 2.Sg3#
- 2.Rxc5#
- 1...Rg5
- 2.Rxc5#
- 2.Qf3#
- 1...Bd3
- 2.Rxc5#
- 2.Qxd3#
- 1...Sd2
- 2.Sxd2#
- 2.Sg3#
- 2.Rxc5#
- 1...Se3
- 2.Sd2#
- 2.Sg3#
- 2.Sxf2#
- 1...Sa5
- 2.Sd2#
- 2.Sg3#
- 2.Qf3#
- 1...Sb6
- 2.Sd2#
- 2.Sg3#
- 2.Qf3#
- 1...Sd6
- 2.Sd2#
- 2.Sg3#
- 2.Qf3#
- 1...Sd4
- 2.Sg3#
- 2.Sxf2#
- 2.Rf4#
- 1...Sf4
- 2.Sg3#
- 2.Rxf4#
- 2.Qf3#
- 1...Sg5
- 2.Sg3#
- 2.Rxc5#
- 2.Rf4#
- 1...Sd8
- 2.Sg3#
- 2.Rf4#
- 2.Qf3#
- 1...Qxd5!
- threat
- 1.Bg7?
- threat
- 2.Rd4#
- 2.Qf3#
- 1...Qxd5
- 2.Sxf2#
- 2.Qf3#
- 1...Rxd5
- 2.Qf3#
- 1...Sxg7
- 2.Qf3#
- 1...Sxf8
- 2.Qf3#
- 1...Qc6
- 2.Qf3#
- 1...Qe3
- 2.Rd4#
- 2.Rdf5#
- 2.Rg5#
- 2.Rxh5#
- 1...Qd4
- 2.Rxd4#
- 2.Re5#
- 2.Qf3#
- 1...Re5
- 2.Sg3#
- 2.Qf3#
- 1...Rf5
- 2.Rd4#
- 1...Bd3
- 2.Rd4#
- 2.Qxd3#
- 1...Be5
- 2.Qf3#
- 1...Sd2
- 2.Sxd2#
- 2.Rd4#
- 1...Se3
- 2.Sd2#
- 2.Sxf2#
- 2.Rd4#
- 1...Se5
- 2.Sd2#
- 2.Sg3#
- 1...Sd4
- 2.Sxf2#
- 2.Rxd4#
- 2.Re5#
- 1...Sg5
- 2.Rd4#
- 2.Rxc5#
- 1...Qxf8!
- threat
- 1.Bh8?
- threat
- 2.Rd4#
- 2.Qf3#
- 1...Qxd5
- 2.Sxf2#
- 2.Qf3#
- 1...Rxd5
- 2.Qf3#
- 1...Rxh8
- 2.Qf3#
- 1...Sxf8
- 2.Qf3#
- 1...Qc6
- 2.Qf3#
- 1...Qe3
- 2.Rd4#
- 2.Rdf5#
- 2.Rg5#
- 2.Rxh5#
- 1...Qd4
- 2.Rxd4#
- 2.Re5#
- 2.Qf3#
- 1...Re5
- 2.Sg3#
- 2.Qf3#
- 1...Rf5
- 2.Rd4#
- 1...Bd3
- 2.Rd4#
- 2.Qxd3#
- 1...Be5
- 2.Qf3#
- 1...Sd2
- 2.Sxd2#
- 2.Rd4#
- 1...Se3
- 2.Sd2#
- 2.Sxf2#
- 2.Rd4#
- 1...Se5
- 2.Sd2#
- 2.Sg3#
- 1...Sd4
- 2.Sxf2#
- 2.Rxd4#
- 2.Re5#
- 1...Sg5
- 2.Rd4#
- 2.Rxc5#
- 1...Sg7
- 2.Qf3#
- 1...Qxf8!
- threat
- 1.Rd1+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Rd5!
- 1...Qd5
- 1.Rd2+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Rd5!
- 1...Qd5
- 1.Rxc5+?
- 1...Rd5
- 2.Sxf2#
- 1...Kd3!
- 1...Rd5
- 1.Rdf5+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Kd3!
- 1...Qd5
- 1.Rg5+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Kd3!
- 1...Qd5
- 1.Rxh5+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Kd3!
- 1...Qd5
- 1.Rd6+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Rd5!
- 1...Qd5
- 1.Rd7+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Rd5!
- 1...Qd5
- 1.Rdd8+?
- 1...Qd5
- 2.Sxf2#
- 1...Qc6
- 2.Sxf2#
- 1...Rd5!
- 1...Qd5
- 1.Qd1?
- threat
- 2.Re5#
- 2.Qf3#
- 2.Qxb1#
- 1...Qxf8
- 2.Re5#
- 2.Qxb1#
- 1...Qxd5
- 2.Sxf2#
- 2.Qf3#
- 2.Qxb1#
- 1...Rxd5
- 2.Qf3#
- 2.Qxb1#
- 1...Sxb2
- 2.Re5#
- 2.Qf3#
- 1...Qe3
- 2.Re5#
- 2.Rdf5#
- 2.Rg5#
- 2.Rxh5#
- 1...Qd4
- 2.Qf3#
- 1...Qc6
- 2.Sxf2#
- 2.Qf3#
- 1...Re5
- 2.Rd4#
- 2.Rxe5#
- 2.Qf3#
- 2.Qxb1#
- 1...Rf5
- 2.Re5#
- 2.Qxb1#
- 1...Ba2
- 2.Re5#
- 2.Qc2#
- 2.Qf3#
- 2.Qd3#
- 1...Bc2
- 2.Re5#
- 2.Qxc2#
- 2.Qf3#
- 1...Bd3
- 2.Re5#
- 2.Qf3#
- 2.Qxd3#
- 1...Be5
- 2.Rd4#
- 2.Rxc5#
- 2.Rxe5#
- 2.Qf3#
- 2.Qxb1#
- 1...Se3
- 2.Sd2#
- 2.Sxf2#
- 2.Re5#
- 2.Qf3#
- 1...Se5
- 2.Rd4#
- 2.Rxe5#
- 1...Sd4
- 2.Sxf2#
- 1...Sf4
- 2.Re5#
- 2.Qf3#
- 1...Sg5
- 2.Rxc5#
- 2.Re5#
- 2.Qxb1#
- 1...a2
- 2.Re5#
- 2.Qf3#
- 1...Sd2!
- threat
- 1.Qxc4+?
- 1...Qd4
- 2.Sxf2#
- 2.Rdf5#
- 2.Rg5#
- 2.Rxh5#
- 1...Qxc4
- 2.Sxf2#
- 1...Sd4
- 2.Sxf2#
- 1...bxc4!
- 1...Qd4
- 1.Sg3+?
- Keys
- 1.Bf6!
- threat
- 2.Qf3#
- 1...Se5
- 2.Sg3#
- 1...Qe3
- 2.Rg5#
- 2.Rxh5#
- 1...Rf5
- 2.Rd4#
- 1...Bd3
- 2.Qxd3#
- 1...Sd2
- 2.Sxd2#
- 1...Se3
- 2.Sd2#
- 1...Sd4
- 2.Re5#
- 1...Sg5
- 2.Rxc5#
- threat
- 1.Bf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- Q(g);N_GUARD::S(G),XP(b)
- Q(g);N_GUARD,P_SPINQ(g),XR(I)::S(G),XP(b)
- R(h);SBLOCK::B(J)+R(I),DCHECK
- B(a);N_GUARD::QAB(E)
- B(a);N_GUARD::QAB(E),XB(a)
- B(a);SBLOCK::B(J)+R(I),DCHECK
- B(j);SBLOCK::B(J)+R(I),DCHECK
- S(d);SBLOCK::B(J)+R(I),DCHECK
- S(i);S_CUTQ(g)::S(G),XP(b)
- Tries
- Try
- S(A);CHECK
- Refutation
- B(j);XS(A)
- Try
- B(F);
- Threat
- DUALS(3)
- Vars
- Q(g);XR(K)::S(A)
- B(j);XB(F)::QAB1(E)
- Q(g);::QAB1(E)
- Refutation
- Q(g);P_SPINQ(g),XR(I)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(h);P_SPINR(h),XR(I)::QAB1(E)
- S(i);XB(F)::QAB1(E)
- S(i);XR(K)::QAB1(E)
- Q(g);::QAB1(E)
- R(h);::B(J)+R(I),DCHECK
- B(j);::QAB1(E)
- Refutation
- Q(g);XR(K)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(h);P_SPINR(h),XR(I)::QAB1(E)
- R(h);XB(F)::QAB1(E)
- S(i);XR(K)::QAB1(E)
- Q(g);::QAB1(E)
- R(h);::B(J)+R(I),DCHECK
- B(j);::QAB1(E)
- S(i);::QAB1(E)
- Refutation
- Q(g);XR(K)
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- R(h);P_SPINR(h)
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- R(h);P_SPINR(h)
- Try
- R(I);CHECK,XQ(g)
- Vars
- R(h);P_SPINR(h)::S(G),XP(b)
- Refutation
- K(e);S_FLIGHT
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- K(e);S_FLIGHT
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- K(e);S_FLIGHT
- Try
- R(I);CHECK,XR(h)
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- K(e);S_FLIGHT
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- R(h);P_SPINR(h)
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- R(h);P_SPINR(h)
- Try
- R(I);CHECK
- Vars
- Q(g);P_SPINQ(g)::S(G),XP(b)
- Refutation
- R(h);P_SPINR(h)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(g);::QAB1(E)
- S(i);S_CUTQ(g)::S(G),XP(b)
- Refutation
- S(d);
- Try
- Q(E);CHECK,XS(d)
- Vars
- Q(g);XQ(E)::S(G),XP(b)
- S(i);P_SPINS(i)::S(G),XP(b)
- Refutation
- P(f);XQ(E)
- Try
- Actual
- B(F);
- Threat
- QAB1(E)
- Vars
- S(d);S_CUTB(j)::S(A)
- R(h);SBLOCK::B(J)+R(I),DCHECK
- B(a);N_GUARD::QAB1(E),XB(a)
- S(d);N_GUARD::S(A),XS(d)
- S(d);N_GUARD::S(A)
- S(i);SBLOCK::B(J)+R(I),DCHECK
- S(i);S_CUTR(h)::B(J)+R(I),XQ(g)
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).