MESON Chess Problem Database
Problem Display
PID: 139343 (3R3B/p5qr/5b2/QP1B1P2/3kp1Np/2R5/n1Pn1P2/7K w - - 0 1)
Ellerman, Arnoldo
2nd Prize, Midweek Sports Referee, 1926
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qh6
- 2.Bf7#
- 1...Qxg4
- 2.Bxf6#
- 1...Qg5
- 2.Bf7#
- 1...Qg6
- 2.Bf7#
- 1...Qb7
- 2.Bxf6#
- 1...Qf7
- 2.Bxf7#
- 1...Qg8
- 2.Bxf6#
- 1...Sb1
- 2.Rc4#
- 1...Sf1
- 2.Rc4#
- 1...Sb3
- 2.Rc4#
- 1...Sf3
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...e3
- 2.fxe3#
- 1...Qh6
- Tries
- 1.Bxa2+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Bb3+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Bc6+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Be6+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Bb7+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Ba8+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Bg8+?
- 1...Qd7
- 2.Bxf6#
- 1...Bxd8!
- 1...Qd7
- 1.Bxg7?
- threat
- 2.Bxa2#
- 2.Bb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 2.Bxf6#
- 1...Bxg7
- 2.Bxa2#
- 2.Bb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 1...Sxc3
- 2.Qxa7#
- 1...Sb4
- 2.Bxf6#
- 1...Sc4
- 2.Rxc4#
- 1...Rh6
- 2.Bxa2#
- 2.Bb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 1...Rh8
- 2.Bg8#
- 2.Bxf6#
- 1...Be5
- 2.Bxa2#
- 2.Bb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 2.Bxe5#
- 1...Sc1
- 2.Ba2#
- 2.Bb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 2.Bxf6#
- 1...Sb3
- 2.Bxb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 2.Bxf6#
- 2.Rc4#
- 1...Sf3
- 2.Bxa2#
- 2.Bb3#
- 2.Bc6#
- 2.Be6#
- 2.Bb7#
- 2.Bf7#
- 2.Ba8#
- 2.Bg8#
- 2.Rc4#
- 1...e3
- 2.Bg2#
- 2.Bf3#
- 2.Bc6#
- 2.Bb7#
- 2.Ba8#
- 2.Bxf6#
- 2.fxe3#
- 1...Rxg7!
- threat
- 1.Rd3+?
- 1...Kc5
- 2.b6#
- 1...exd3!
- 1...Kc5
- 1.Rc7?
- threat
- 2.Qxd2#
- 2.Qxa7#
- 1...Qxg4
- 2.Bxf6#
- 1...Bxd8
- 2.Qxd2#
- 1...Qd7
- 2.Qxd2#
- 1...Qh6
- 2.Bf7#
- 2.Qxa7#
- 1...Qf8
- 2.Qxd2#
- 1...Qg5
- 2.Bf7#
- 2.Qxa7#
- 1...Qe7
- 2.Qxd2#
- 1...Bg5
- 2.Qxa7#
- 1...Be7
- 2.Qxd2#
- 1...Sc1
- 2.Qc3#
- 2.Qa1#
- 2.Qxa7#
- 1...Sc3
- 2.Qxc3#
- 2.Qxa7#
- 1...Sb4
- 2.Qa1#
- 2.Qxa7#
- 1...Sb1
- 2.Rc4#
- 2.Qxa7#
- 1...Sf1
- 2.Rc4#
- 2.Qxa7#
- 1...Sb3
- 2.Rc4#
- 1...Sf3
- 2.Rc4#
- 2.Qxa7#
- 1...Sc4
- 2.Rxc4#
- 1...e3
- 2.Qxa7#
- 2.fxe3#
- 1...a6
- 2.Qxd2#
- 2.Qb6#
- 1...Qxc7!
- threat
- 1.Rcc8?
- threat
- 2.Qxd2#
- 1...Qxg4
- 2.Bxf6#
- 1...Qh6
- 2.Bf7#
- 1...Qg5
- 2.Bf7#
- 1...Bg5
- 2.Qxa7#
- 1...Sc1
- 2.Qc3#
- 2.Qa1#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qa1#
- 1...Sb1
- 2.Rc4#
- 1...Sf1
- 2.Rc4#
- 1...Sb3
- 2.Rc4#
- 1...Sf3
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...e3
- 2.fxe3#
- 1...Qc7!
- threat
- 1.Qb4+?
- 1...Sc4
- 2.Rxc4#
- 2.Qxc4#
- 1...Sxb4!
- 1...Sc4
- 1.Qxa7+?
- 1...Qxa7
- 2.Bxf6#
- 1...Kxc3!
- 1...Qxa7
- 1.Bxa2+?
- Keys
- 1.Rc6!
- threat
- 2.Qxd2#
- 1...Qxg4
- 2.Bxf6#
- 1...Qh6
- 2.Bf7#
- 1...Qg5
- 2.Bf7#
- 1...Bg5
- 2.Qxa7#
- 1...Sc1
- 2.Qc3#
- 2.Qa1#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qa1#
- 1...Sb1
- 2.Rc4#
- 1...Sf1
- 2.Rc4#
- 1...Sb3
- 2.Rc4#
- 1...Sf3
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...e3
- 2.fxe3#
- threat
- 1.Rc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- Q(h);P_SPINB(f)::R(J)+B(H)
- Q(h);OGATE,P_SPINB(f),XS(E)::B(K),XB(f)
- Q(h);OGATE,P_SPINB(f)::B(K),XB(f)
- Q(h);P_SPINB(f)::R(J)+B(H),XQ(h)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- P(d);OGATE::P(C),XP(d)
- Tries
- Try
- B(H);CHECK,XS(a)
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(H);CHECK
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(H);CHECK
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(H);CHECK
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(H);CHECK
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(H);CHECK
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(H);CHECK
- Vars
- Q(h);OGATE,P_SPINB(f),P_SPINQ(h)::B(K),XB(f)
- Refutation
- B(f);P_SPINQ(h),XR(J)
- Try
- B(K);P_PINB(f),XQ(h)
- Threat
- DUALS(9)
- Vars
- S(a);SBLOCK,XR(D)::QAB(F),XP(g)
- S(a);::B(K),XB(f)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- R(i);N_SPINB(f),XB(K)
- Try
- R(D);CHECK
- Vars
- K(c);S_FLIGHT::QAR(F)+P(G)
- Refutation
- P(d);XR(D)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- Q(h);OGATE,P_SPINB(f),XS(E)::B(K),XB(f)
- B(f);P_SPINQ(h),XR(J)::QAR2(F),XS(b)
- Q(h);P_SPINB(f)::QAR2(F),XS(b)
- B(f);P_SPINQ(h)::QAB(F),XP(g)
- B(f);P_SPINQ(h)::QAR2(F),XS(b)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- Refutation
- Q(h);P_SPINB(f),XR(D)
- Try
- R(D);
- Threat
- QAR2(F),XS(b)
- Vars
- Q(h);OGATE,P_SPINB(f),XS(E)::B(K),XB(f)
- Q(h);P_SPINB(f)::R(J)+B(H)
- B(f);P_SPINQ(h)::QAB(F),XP(g)
- S(a);N_GUARD::QAB1(F),XS(a)
- S(a);OGATE::QAB(F)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- P(d);OGATE::P(C),XP(d)
- Refutation
- Q(h);P_SPINB(f)
- Try
- Q(F);CHECK
- Refutation
- S(a);XQ(F)
- Try
- Q(F);CHECK,XP(g)
- Vars
- Q(h);OGATE,P_SPINB(f),XQ(F)::B(K),XB(f)
- Refutation
- K(c);S_FLIGHT,XR(D)
- Try
- Actual
- R(D);
- Threat
- QAR2(F),XS(b)
- Vars
- Q(h);OGATE,P_SPINB(f),XS(E)::B(K),XB(f)
- Q(h);P_SPINB(f)::R(J)+B(H)
- B(f);P_SPINQ(h)::QAB(F),XP(g)
- S(a);N_GUARD::QAB1(F),XS(a)
- S(a);OGATE::QAB(F)
- S(b);N_GUARD::R1(D)
- S(b);N_GUARD::R1(D),XS(b)
- P(d);OGATE::P(C),XP(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).