MESON Chess Problem Database
Problem Display
PID: 66145 (2q5/pr3PpP/6B1/1PBPPP2/Q2K3k/2pPNpR1/2R1r3/b6N w - - 0 1)
Rosner, Eugene David
7th Comm., The Problemist, 1997/I
#2
15 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxf5
- 2.Sxf5#
- 1...Qe6
- 2.h8Q#
- 2.h8R#
- 1...Qd7
- 2.h8Q#
- 2.h8R#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qc6
- 2.h8Q#
- 2.h8R#
- 1...Qc7
- 2.h8Q#
- 2.h8R#
- 1...Re1
- 2.Rh2#
- 1...Rh2
- 2.Rxh2#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 1...Rxb5
- 2.Be7#
- 1...Re7
- 2.Bxe7#
- 1...Rb8
- 2.Be7#
- 1...f2
- 2.Sg2#
- 1...Qxf5
- Tries
- 1.Ke4?
- threat
- 2.Kxf3#
- 1...Qxf5+
- 2.Kxf5#
- 1...Rxe3+
- 2.Kxe3#
- 1...Qxc5
- 2.h8Q#
- 2.h8R#
- 1...Rxb5
- 2.Be7#
- 1...f2
- 2.Kf3#
- 1...Rf2!
- threat
- 1.Sg2+?
- 1...Rxg2
- 2.Ke3#
- 1...fxg2!
- 1...Rxg2
- 1.Rxe2?
- threat
- 2.Rh2#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...fxe2
- 2.Sg2#
- 1...f2
- 2.Sg2#
- 1...c2+!
- threat
- 1.d6?
- threat
- 2.Kd5#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 1...Qe6
- 2.h8Q#
- 2.h8R#
- 1...Qc6
- 2.h8Q#
- 2.h8R#
- 1...Rxb5!
- threat
- 1.e6?
- threat
- 2.Ke5#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxe6
- 2.h8Q#
- 2.h8R#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 1...Rxb5
- 2.Be7#
- 1...Qc7
- 2.h8Q#
- 2.h8R#
- 1...Qb8!
- threat
- 1.f8Q?
- threat
- 2.h8Q#
- 2.h8R#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxc2
- 2.h8Q#
- 2.h8R#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rxb5
- 2.Be7#
- 2.Qe7#
- 2.h8Q#
- 2.h8R#
- 1...Qe6
- 2.h8Q#
- 2.h8R#
- 1...Qd7
- 2.h8Q#
- 2.h8R#
- 1...Qc6
- 2.h8Q#
- 2.h8R#
- 1...Qc7
- 2.h8Q#
- 2.h8R#
- 1...Qa8
- 2.h8Q#
- 2.h8R#
- 1...Qb8
- 2.h8Q#
- 2.h8R#
- 1...Qd8
- 2.h8Q#
- 2.h8R#
- 1...Qe8
- 2.h8Q#
- 2.h8R#
- 1...Re1
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rd2
- 2.h8Q#
- 2.h8R#
- 1...Rf2
- 2.h8Q#
- 2.h8R#
- 1...Rg2
- 2.h8Q#
- 2.h8R#
- 1...Rh2
- 2.Rxh2#
- 2.h8Q#
- 2.h8R#
- 1...Rb6
- 2.h8Q#
- 2.h8R#
- 1...Rc7
- 2.h8Q#
- 2.h8R#
- 1...Rd7
- 2.h8Q#
- 2.h8R#
- 1...Re7
- 2.Bxe7#
- 2.Qxe7#
- 2.h8Q#
- 2.h8R#
- 1...Rf7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Be7#
- 2.Qe7#
- 2.h8Q#
- 2.h8R#
- 1...Bb2
- 2.h8Q#
- 2.h8R#
- 1...f2
- 2.Sg2#
- 2.h8Q#
- 2.h8R#
- 1...a5
- 2.h8Q#
- 2.h8R#
- 1...a6
- 2.h8Q#
- 2.h8R#
- 1...Qxf8!
- threat
- 1.f8S?
- threat
- 2.h8Q#
- 2.h8R#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxc2
- 2.h8Q#
- 2.h8R#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rxb5
- 2.Be7#
- 2.h8Q#
- 2.h8R#
- 1...Qe6
- 2.h8Q#
- 2.h8R#
- 1...Qd7
- 2.h8Q#
- 2.h8R#
- 1...Qc6
- 2.h8Q#
- 2.h8R#
- 1...Qc7
- 2.h8Q#
- 2.h8R#
- 1...Qa8
- 2.h8Q#
- 2.h8R#
- 1...Qb8
- 2.h8Q#
- 2.h8R#
- 1...Qd8
- 2.h8Q#
- 2.h8R#
- 1...Qe8
- 2.h8Q#
- 2.h8R#
- 1...Re1
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rd2
- 2.h8Q#
- 2.h8R#
- 1...Rf2
- 2.h8Q#
- 2.h8R#
- 1...Rg2
- 2.h8Q#
- 2.h8R#
- 1...Rh2
- 2.Rxh2#
- 2.h8Q#
- 2.h8R#
- 1...Rb6
- 2.h8Q#
- 2.h8R#
- 1...Rc7
- 2.h8Q#
- 2.h8R#
- 1...Rd7
- 2.h8Q#
- 2.h8R#
- 1...Re7
- 2.Bxe7#
- 2.h8Q#
- 2.h8R#
- 1...Rf7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Be7#
- 2.h8Q#
- 2.h8R#
- 1...Bb2
- 2.h8Q#
- 2.h8R#
- 1...f2
- 2.Sg2#
- 2.h8Q#
- 2.h8R#
- 1...a5
- 2.h8Q#
- 2.h8R#
- 1...a6
- 2.h8Q#
- 2.h8R#
- 1...Qxf8!
- threat
- 1.f8B?
- threat
- 2.h8Q#
- 2.h8R#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxc2
- 2.h8Q#
- 2.h8R#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rxb5
- 2.Bce7#
- 2.Bfe7#
- 2.h8Q#
- 2.h8R#
- 1...Qe6
- 2.h8Q#
- 2.h8R#
- 1...Qd7
- 2.h8Q#
- 2.h8R#
- 1...Qc6
- 2.h8Q#
- 2.h8R#
- 1...Qc7
- 2.h8Q#
- 2.h8R#
- 1...Qa8
- 2.h8Q#
- 2.h8R#
- 1...Qb8
- 2.h8Q#
- 2.h8R#
- 1...Qd8
- 2.h8Q#
- 2.h8R#
- 1...Qe8
- 2.h8Q#
- 2.h8R#
- 1...Re1
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rd2
- 2.h8Q#
- 2.h8R#
- 1...Rf2
- 2.h8Q#
- 2.h8R#
- 1...Rg2
- 2.h8Q#
- 2.h8R#
- 1...Rh2
- 2.Rxh2#
- 2.h8Q#
- 2.h8R#
- 1...Rb6
- 2.h8Q#
- 2.h8R#
- 1...Rc7
- 2.h8Q#
- 2.h8R#
- 1...Rd7
- 2.h8Q#
- 2.h8R#
- 1...Re7
- 2.Bcxe7#
- 2.Bfxe7#
- 2.h8Q#
- 2.h8R#
- 1...Rf7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Bce7#
- 2.Bfe7#
- 2.h8Q#
- 2.h8R#
- 1...Bb2
- 2.h8Q#
- 2.h8R#
- 1...f2
- 2.Sg2#
- 2.h8Q#
- 2.h8R#
- 1...a5
- 2.h8Q#
- 2.h8R#
- 1...a6
- 2.h8Q#
- 2.h8R#
- 1...Qxf8!
- threat
- 1.f8R?
- threat
- 2.h8Q#
- 2.h8R#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxc2
- 2.h8Q#
- 2.h8R#
- 1...Rxe3
- 2.Kxe3#
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rxb5
- 2.Be7#
- 2.h8Q#
- 2.h8R#
- 1...Qe6
- 2.h8Q#
- 2.h8R#
- 1...Qd7
- 2.h8Q#
- 2.h8R#
- 1...Qc6
- 2.h8Q#
- 2.h8R#
- 1...Qc7
- 2.h8Q#
- 2.h8R#
- 1...Qa8
- 2.h8Q#
- 2.h8R#
- 1...Qb8
- 2.h8Q#
- 2.h8R#
- 1...Qd8
- 2.h8Q#
- 2.h8R#
- 1...Qe8
- 2.h8Q#
- 2.h8R#
- 1...Re1
- 2.Rh2#
- 2.h8Q#
- 2.h8R#
- 1...Rd2
- 2.h8Q#
- 2.h8R#
- 1...Rf2
- 2.h8Q#
- 2.h8R#
- 1...Rg2
- 2.h8Q#
- 2.h8R#
- 1...Rh2
- 2.Rxh2#
- 2.h8Q#
- 2.h8R#
- 1...Rb6
- 2.h8Q#
- 2.h8R#
- 1...Rc7
- 2.h8Q#
- 2.h8R#
- 1...Rd7
- 2.h8Q#
- 2.h8R#
- 1...Re7
- 2.Bxe7#
- 2.h8Q#
- 2.h8R#
- 1...Rf7
- 2.h8Q#
- 2.h8R#
- 1...Rb8
- 2.Be7#
- 2.h8Q#
- 2.h8R#
- 1...Bb2
- 2.h8Q#
- 2.h8R#
- 1...f2
- 2.Sg2#
- 2.h8Q#
- 2.h8R#
- 1...a5
- 2.h8Q#
- 2.h8R#
- 1...a6
- 2.h8Q#
- 2.h8R#
- 1...Qxf8!
- threat
- 1.Ke4?
- Keys
- 1.Kc4!
- threat
- 2.Kb3#
- 1...Qxc5+
- 2.Kxc5#
- 1...Qxf5
- 2.Sxf5#
- 1...Rxe3
- 2.Rh2#
- 1...Rxb5
- 2.Kxb5#
- threat
- 1.Kc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- Q(i);XP(L)::S(D),XQ(i)
- Q(i);N_GUARD::P=Q
- Q(i);N_GUARD,P_PINP(J)::P=Q
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- R(b);OGATE::R(B)
- R(b);OGATE::R(B),XR(b)
- R(g);N_GUARD,XP(H)::B(I)
- R(g);N_GUARD::B(I),XR(g)
- R(g);N_GUARD::B(I)
- P(d);N_GUARD,S_CUTR(b)::S(D)
- Tries
- Try
- K(G);P-FLIGHT,P_SPINS(D)
- Threat
- QAR(F)+K(G),XP(d)
- Vars
- Q(i);CHECK,XP(L)::QAR(F)+K(G),XQ(i)
- R(b);CHECK,XS(D)::QAR(F)+K(G),XR(b)
- Q(i);N_GUARD,XB(I)::P=Q
- R(g);N_GUARD,XP(H)::B(I)
- P(d);::QAR(F)+K(G)
- Refutation
- R(b);N_PINS(D)
- Try
- S(D);CHECK
- Vars
- R(b);XS(D)::QAR(F)+K(G)
- Refutation
- P(d);XS(D)
- Try
- R(B);XR(b)
- Threat
- R(B)
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);XP(L)::S(D),XQ(i)
- P(d);N_GUARD,XR(B)::S(D)
- P(d);N_GUARD::S(D)
- Refutation
- P(c);CHECK
- Try
- P(J);
- Threat
- QAR(F)+K(G)
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);XP(L)::S(D),XQ(i)
- Q(i);N_GUARD::P=Q
- Refutation
- R(g);XP(H)
- Try
- P(K);
- Threat
- QAR(F)+K(G)
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);N_GUARD,XP(K)::P=Q
- R(g);N_GUARD,XP(H)::B(I)
- Q(i);N_GUARD::P=Q
- Refutation
- Q(i);
- Try
- P(N);
- Threat
- P=Q
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);XP(L)::S(D),XQ(i)
- R(b);XR(B)::P=Q
- Q(i);::P=Q
- Q(i);P_PINP(J)::P=Q
- R(b);P_PINP(C)::P=Q
- R(b);::P=Q
- R(g);::P=Q
- R(g);P_PINP(J)::P=Q
- B(a);::P=Q
- P(f);::P=Q
- Refutation
- Q(i);XQ(N)
- Try
- P(N);
- Threat
- P=Q
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);XP(L)::S(D),XQ(i)
- R(b);XR(B)::P=Q
- Q(i);::P=Q
- Q(i);P_PINP(J)::P=Q
- R(b);P_PINP(C)::P=Q
- R(b);::P=Q
- R(g);::P=Q
- R(g);P_PINP(J)::P=Q
- B(a);::P=Q
- P(f);::P=Q
- Refutation
- Q(i);XS(N)
- Try
- P(N);
- Threat
- P=Q
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);XP(L)::S(D),XQ(i)
- R(b);XR(B)::P=Q
- Q(i);::P=Q
- Q(i);P_PINP(J)::P=Q
- R(b);P_PINP(C)::P=Q
- R(b);::P=Q
- R(g);::P=Q
- R(g);P_PINP(J)::P=Q
- B(a);::P=Q
- P(f);::P=Q
- Refutation
- Q(i);XB(N)
- Try
- P(N);
- Threat
- P=Q
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);XP(L)::S(D),XQ(i)
- R(b);XR(B)::P=Q
- Q(i);::P=Q
- Q(i);P_PINP(J)::P=Q
- R(b);P_PINP(C)::P=Q
- R(b);::P=Q
- R(g);::P=Q
- R(g);P_PINP(J)::P=Q
- B(a);::P=Q
- P(f);::P=Q
- Refutation
- Q(i);XR(N)
- Try
- Actual
- K(G);P-FLIGHT,P_SPINB(I)
- Threat
- QAR(F)+K(G)
- Vars
- Q(i);CHECK,XB(I)::QAR(F)+K(G),XQ(i)
- Q(i);N_PINB(I),XP(L)::S(D),XQ(i)
- R(b);XS(D)::R(B)
- R(g);XP(H)::QAR(F)+K(G),XR(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).