MESON Chess Problem Database
Problem Display
PID: 52427 (1B3n2/3PR2r/3RN3/3Bkp1N/n4pp1/2q5/2p5/Q3bK2 w - - 0 1)
Burger, Robert Eugene
American Chess Bulletin, 1955
#2
9 + 10
| 5064 | 100 Years of the American Two-move Chess Problem | 1962 |
| 274 | diagrammes | 1974 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Qxe1#
- 1...Qd4
- 2.Qxd4#
- 1...Sxd7
- 2.Rdxd7#
- 1...Qb2
- Tries
- 1.Sd4+?
- 1...Rxe7
- 2.Sc6#
- 1...Se6
- 2.Sc6#
- 1...Kxd4!
- 1...Rxe7
- 1.Sd8+?
- 1...Rxe7
- 2.Sc6#
- 1...Se6
- 2.Sc6#
- 1...Kd4!
- 1...Rxe7
- 1.Bh1?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Rxh5
- 2.Sxf8#
- 1...Rxe7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Sxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 2.Rd5#
- 2.Rdxd7#
- 1...Qd4
- 2.Rxd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Qxd4#
- 1...Bd2
- 2.Rxd2#
- 2.Rd3#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Sb2
- 2.Rd5#
- 2.Rc6#
- 1...Sb6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Rxb6#
- 2.Rc6#
- 1...f3!
- threat
- 1.Bg2?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Rxh5
- 2.Sxf8#
- 1...Rxe7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Sxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 2.Rd5#
- 2.Rdxd7#
- 1...Qd4
- 2.Rxd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Qxd4#
- 1...Bd2
- 2.Rxd2#
- 2.Rd3#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Sb2
- 2.Rd5#
- 2.Rc6#
- 1...Sb6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Rxb6#
- 2.Rc6#
- 1...f3!
- threat
- 1.Bf3?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Rxh5
- 2.Sxf8#
- 1...Rxe7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Sxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 2.Rd5#
- 2.Rdxd7#
- 1...Qd4
- 2.Rxd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Qxd4#
- 1...Bd2
- 2.Rxd2#
- 2.Rd3#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 1...Sb2
- 2.Rd5#
- 2.Rc6#
- 1...Sb6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd5#
- 2.Rxb6#
- 2.Rc6#
- 1...gxf3!
- threat
- 1.Bc6?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 1...Rxh5
- 2.Sxf8#
- 1...Sxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 2.Rdxd7#
- 1...Qb2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Qxe1#
- 1...Qd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Bd2
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 1...Rxe7!
- threat
- 1.Bb7?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Ra6#
- 2.Rb6#
- 1...Rxh5
- 2.Sxf8#
- 1...Rxe7
- 2.Ra6#
- 2.Rb6#
- 1...Sxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 2.Rdxd7#
- 1...Qd4
- 2.Rxd4#
- 2.Ra6#
- 2.Rb6#
- 2.Qxd4#
- 1...Bd2
- 2.Rxd2#
- 2.Rd3#
- 2.Ra6#
- 2.Rb6#
- 1...Sb6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rxb6#
- 1...Sb2!
- threat
- 1.Ba8?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Ra6#
- 2.Rb6#
- 1...Rxh5
- 2.Sxf8#
- 1...Rxe7
- 2.Ra6#
- 2.Rb6#
- 1...Sxe6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 2.Rdxd7#
- 1...Qd4
- 2.Rxd4#
- 2.Ra6#
- 2.Rb6#
- 2.Qxd4#
- 1...Bd2
- 2.Rxd2#
- 2.Rd3#
- 2.Ra6#
- 2.Rb6#
- 1...Sb6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rxb6#
- 1...Sb2!
- threat
- 1.Sd4+?
- Keys
- 1.Bc4!
- threat
- 2.Rd4#
- 1...Ke4
- 2.Sg5#
- 1...Rxh5
- 2.Sxf8#
- 1...Sxe6
- 2.Rexe6#
- 1...Sxd7
- 2.Seg7#
- 1...Qb2
- 2.Qxe1#
- 1...Qd4
- 2.Rxd4#
- 2.Qxd4#
- threat
- 1.Bc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- Q(c);N_GUARD::QAR(A),XB(a)
- Q(c);OGATE::QAB1(A),XQ(c)
- S(j);OGATE,XP(G)::B(I)+R(E),XS(j)
- Tries
- Try
- S(F);CHECK,N_PINQ(c)
- Vars
- R(i);XR(H)::S(F)
- S(j);P_SPINS(j)::S(F)
- Refutation
- K(g);P_SPINQ(c),S_FLIGHT,XS(F)
- Try
- S(F);CHECK
- Vars
- R(i);XR(H)::S(F)
- S(j);P_SPINS(j)::S(F)
- Refutation
- K(g);S_FLIGHT
- Try
- B(C);
- Threat
- DUALS(7)
- Vars
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- Refutation
- P(e);
- Try
- B(C);
- Threat
- DUALS(7)
- Vars
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- Refutation
- P(e);
- Try
- B(C);
- Threat
- DUALS(7)
- Vars
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- Refutation
- P(f);XB(C)
- Try
- B(C);
- Threat
- DUALS(4)
- Vars
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- Refutation
- R(i);XR(H)
- Try
- B(C);
- Threat
- DUALS(5)
- Vars
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- Refutation
- S(d);N_SPINQ(c)
- Try
- B(C);
- Threat
- DUALS(5)
- Vars
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- Refutation
- S(d);N_SPINQ(c)
- Try
- Actual
- B(C);
- Threat
- B(I)+R(E)
- Vars
- K(g);N_SPINQ(c),P-FLIGHT::R(H)+S(F),DCHECK
- R(i);N_GUARD,XS(D)::R(H)+S(F),XS(j)
- S(j);OGATE,P_SPINS(j),XS(F)::R1(H),XS(j)
- S(j);N_GUARD,XP(G)::R(H)+S(F)
- Q(c);N_GUARD::QAR(A),XB(a)
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