MESON Chess Problem Database
Problem Display
PID: 287295 (1b6/3pPr2/1PPR4/K1N3pQ/p2pBkNp/2pp4/q4pRP/6B1 w - - 0 1)
le Grand, Piet
Mat, 1987
#2
12 + 12
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Rxf2#
- 2.Qxf7#
- 1...Qb3
- 2.Rxf2#
- 1...Qc4
- 2.Rxf2#
- 1...Qd5
- 2.Rxf2#
- 1...Qe6
- 2.Rxf2#
- 1...Qa1
- 2.Rxf2#
- 2.Qxf7#
- 1...Qb2
- 2.Qxf7#
- 1...Qc2
- 2.Qxf7#
- 1...Qd2
- 2.Qxf7#
- 1...Qe2
- 2.Qxf7#
- 1...Qa3
- 2.Rxf2#
- 2.Qxf7#
- 1...Rf6
- 2.Rxf6#
- 1...Rxe7
- 2.Rf6#
- 1...Rg7
- 2.Rf6#
- 1...Rh7
- 2.Rf6#
- 1...c2
- 2.Rxf2#
- 1...d2
- 2.Rxf2#
- 1...Qb1
- Tries
- 1.Bd5?
- threat
- 2.Qxf7#
- 1...Kf5
- 2.Qxf7#
- 1...Rxe7
- 2.Rf6#
- 1...Rf5
- 2.Sxd3#
- 1...Rf6
- 2.Rxf6#
- 1...Rg7
- 2.Rf6#
- 1...Rh7
- 2.Rf6#
- 1...Rf8
- 2.exf8Q#
- 2.exf8R#
- 1...Qxd5!
- threat
- 1.Rd5?
- threat
- 2.Qxf7#
- 2.Qxg5#
- 1...Qxd5
- 2.Rxf2#
- 1...Rxe7
- 2.Rf5#
- 2.Qxg5#
- 1...Rf5
- 2.Rxf5#
- 1...Rf6
- 2.Qxg5#
- 1...Rg7
- 2.Rf5#
- 1...Rh7
- 2.Rf5#
- 2.Qxg5#
- 1...Rf8
- 2.Qxg5#
- 2.exf8Q#
- 2.exf8R#
- 1...Be5!
- threat
- 1.Rg6?
- threat
- 2.Qxg5#
- 1...Qd5
- 2.Rxf2#
- 1...Rf5!
- threat
- 1.e8Q?
- threat
- 2.Sxd3#
- 2.Qe5#
- 1...Bxd6
- 2.Sxd3#
- 1...f1Q
- 2.Qe5#
- 1...f1B
- 2.Qe5#
- 1...Qb1
- 2.Rxf2#
- 2.Qhxf7#
- 2.Qexf7#
- 2.Qe5#
- 1...Qc4
- 2.Rxf2#
- 2.Qe5#
- 1...Qd5
- 2.Rxf2#
- 1...Qe6
- 2.Rxf2#
- 1...Qc2
- 2.Qhxf7#
- 2.Qexf7#
- 2.Qe5#
- 1...Qd2
- 2.Qhxf7#
- 2.Qexf7#
- 2.Qe5#
- 1...Qe2
- 2.Qhxf7#
- 2.Qexf7#
- 2.Qe5#
- 1...Re7
- 2.Rf6#
- 1...d2
- 2.Sd3#
- 2.Rxf2#
- 2.Qe5#
- 1...Rf5!
- threat
- 1.Bd5?
- Keys
- 1.Rxd4!
- threat
- 2.Sxd3#
- 1...f1Q
- 2.Be3#
- 1...f1B
- 2.Be3#
- 1...Qb1
- 2.Rxf2#
- 2.Qxf7#
- 1...Qc4
- 2.Rxf2#
- 1...Qd5
- 2.Rxf2#
- 1...Qc2
- 2.Qxf7#
- 1...Qd2
- 2.Qxf7#
- 1...Qe2
- 2.Qxf7#
- 1...Rf5
- 2.Bd5#
- 1...d2
- 2.Sd3#
- 2.Rxf2#
- threat
- 1.Rxd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD::R(B),XP(b)
- Q(a);N_GUARD,P_PINS(G)::R(B),XP(b)
- Q(a);N_GUARD::QAR(H),XR(k)
- R(k);N_GUARD::R(K),XR(k)
- R(k);N_GUARD,XP(L)::R(K)
- R(k);N_GUARD::R(K)
- P(c);S_CUTQ(a)::R(B),XP(b)
- P(d);S_CUTQ(a)::R(B),XP(b)
- Tries
- Try
- B(D);
- Threat
- QAR(H),XR(k)
- Vars
- K(g);P-FLIGHT,P_SPINP(i)::QAR2(H),XR(k)
- R(k);N_GUARD,XP(L)::R(K)
- R(k);SBLOCK::S(G),XP(d)
- R(k);N_GUARD::R(K),XR(k)
- R(k);N_GUARD::R(K)
- R(k);OGATE::PXR(k)=Q
- Refutation
- Q(a);P_PINS(G),XB(D)
- Try
- R(K);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,P_PINS(G),XR(K)::R(B),XP(b)
- R(k);N_GUARD::R1(K),XR(k)
- R(k);::QAB1(H),XP(i)
- R(k);N_GUARD::R1(K)
- Refutation
- B(l);
- Try
- R(K);
- Threat
- QAB1(H),XP(i)
- Vars
- Q(a);N_GUARD,P_PINS(G)::R(B),XP(b)
- Refutation
- R(k);P_PINS(G)
- Try
- P(L);
- Threat
- DUALS(2)
- Vars
- B(l);XR(K)::S(G),XP(d)
- P(b);::QAB1(L)
- Q(a);N_GUARD,P_PINS(G)::R(B),XP(b)
- Q(a);N_GUARD::R(B),XP(b)
- R(k);N_GUARD::R(K)
- Refutation
- R(k);P_PINS(G)
- Try
- Actual
- R(K);XP(f)
- Threat
- S(G),XP(d)
- Vars
- P(b);OGATE::B(A)
- Q(a);N_GUARD::R(B),XP(b)
- Q(a);N_GUARD,P_PINS(G)::R(B),XP(b)
- Q(a);N_GUARD::QAR(H),XR(k)
- R(k);P_PINS(G),SBLOCK::R(K)+B(D)
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).