MESON Chess Problem Database
Problem Display
PID: 57317 (2N2N2/1Bb1r3/5QR1/1pkp1b1R/1p5r/1P5p/5P2/6BK w - - 0 1)
Ellerman, Arnoldo
4th HM., Brisbane Courier, 1918-1919
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Rd4
- 2.Qc6#
- 1...Re6
- 2.Sd7#
- 1...Bb1
- 2.Rxd5#
- 1...Bc2
- 2.Rxd5#
- 1...Bd3
- 2.Rxd5#
- 1...Be4+
- 2.f3#
- 1...Bg4
- 2.Rxd5#
- 1...Be6
- 2.f4#
- 1...Bxg6
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Bxc8
- 2.Rxd5#
- 1...Bh2
- 2.Qb6#
- 1...Bg3
- 2.Qb6#
- 1...Bf4
- 2.Qb6#
- 1...Be5
- 2.Qb6#
- 1...Bb6
- 2.Qxb6#
- 1...Bb8
- 2.Qb6#
- 1...d4
- 2.Qc6#
- 1...Rd4
- Tries
- 1.Se6+?
- 1...Bxe6
- 2.f4#
- 1...Rxe6!
- 1...Bxe6
- 1.Sd7+?
- 1...Bxd7
- 2.Rxd5#
- 1...Rxd7!
- 1...Bxd7
- 1.Qb2?
- threat
- 2.Rc6#
- 1...Be4+
- 2.f3#
- 1...Bxg6
- 2.Rxd5#
- 1...Re6
- 2.Sd7#
- 1...Be6
- 2.f4#
- 1...Bd7
- 2.Rxd5#
- 1...d4
- 2.Qc1#
- 2.Qc2#
- 1...Bd6!
- threat
- 1.Qc3+?
- 1...Rc4
- 2.Rc6#
- 1...bxc3!
- 1...Rc4
- 1.Qd4+?
- 1...Rxd4
- 2.Rc6#
- 1...Kxd4!
- 1...Rxd4
- 1.Qxe7+?
- 1...Kd4
- 2.Qe3#
- 1...Bd6!
- 1...Kd4
- 1.f3+?
- 1...Rd4
- 2.Bxd4#
- 2.Qxd4#
- 2.Qc6#
- 1...d4
- 2.Qc6#
- 1...Re3!
- 1...Rd4
- 1.f4+?
- 1...d4
- 2.Bxd4#
- 2.Qxd4#
- 2.Qc6#
- 1...Re3!
- 1...d4
- 1.Se6+?
- Keys
- 1.Qa1!
- threat
- 2.Rc6#
- 1...Be4+
- 2.f3#
- 1...Bxg6
- 2.Rxd5#
- 1...Re6
- 2.Sd7#
- 1...Be6
- 2.f4#
- 1...Bd7
- 2.Rxd5#
- 1...Bd6
- 2.Qa7#
- 1...d4
- 2.Qc1#
- threat
- 1.Qa1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 12
- Sets
- R(c);SBLOCK::QAR1(F)
- R(i);N_GUARD,S_CUTB(g)::S(J)
- B(g);OGATE,P_SPINP(f)::R1(E),XP(f)
- B(g);CHECK,P_SPINP(f),S_CUTR(c),S_CUTR(i)::B(A)+P(C)
- B(g);P_SPINP(f),S_CUTR(i)::B(A)+P(C)
- B(g);OGATE,P_SPINP(f),XR(G)::R1(E),XP(f)
- B(g);OGATE,P_SPINP(f),XS(I)::R1(E),XP(f)
- B(h);N_GUARD::QAB1(F)
- B(h);N_GUARD::QAB1(F),XB(h)
- P(f);P_SPINB(g),SBLOCK::QAR1(F)
- Tries
- Try
- S(J);CHECK
- Vars
- B(g);P_SPINP(f),XS(J)::B(A)+P(C)
- Refutation
- R(i);XS(J)
- Try
- S(J);CHECK
- Vars
- B(g);OGATE,P_SPINP(f),XS(J)::R1(E),XP(f)
- Refutation
- R(i);XS(J)
- Try
- Q(F);
- Threat
- R1(G)
- Vars
- B(g);CHECK,P_SPINP(f),S_CUTR(c),S_CUTR(i)::B(A)+P(C)
- B(g);OGATE,P_SPINP(f),XR(G)::R1(E),XP(f)
- R(i);N_GUARD,S_CUTB(g)::S(J)
- B(g);P_SPINP(f),S_CUTR(i)::B(A)+P(C)
- B(g);OGATE,P_SPINP(f)::R1(E),XP(f)
- Refutation
- B(h);
- Try
- Q(F);CHECK
- Vars
- R(c);P_SPINR(c)::R1(G)
- Refutation
- P(b);XQ(F)
- Try
- Q(F);CHECK
- Vars
- R(c);SBLOCK,XQ(F)::R1(G)
- Refutation
- K(e);S_FLIGHT,XQ(F)
- Try
- Q(F);CHECK,XR(i)
- Vars
- K(e);S_FLIGHT::QAB1(F)
- Refutation
- B(h);P_SPINB(h)
- Try
- P(C);CHECK
- Vars
- P(f);P_SPINB(g),P_SPINP(f)::QAR1(F)
- Refutation
- R(i);P_SPINR(i)
- Try
- P(C);CHECK
- Refutation
- R(i);P_SPINR(i)
- Try
- Actual
- Q(F);
- Threat
- R1(G)
- Vars
- B(g);CHECK,P_SPINP(f),S_CUTR(c),S_CUTR(i)::B(A)+P(C)
- B(g);OGATE,P_SPINP(f),XR(G)::R1(E),XP(f)
- R(i);N_GUARD,S_CUTB(g)::S(J)
- B(g);P_SPINP(f),S_CUTR(i)::B(A)+P(C)
- B(g);OGATE,P_SPINP(f)::R1(E),XP(f)
- B(h);N_GUARD::QAB(F)
- P(f);P_SPINB(g),SBLOCK,S_CUTR(c)::QAR(F)
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).