MESON Chess Problem Database

Problem Display
PID: 133463 (n7/Q1p5/1r2P3/1pk2N1p/1R5R/2pPK1p1/2P1P1B1/8 w - - 0 1)

Andrade, Barry Jack da Costa

The Field, 1961

(First published on Thu Mar 2 1961)

n7/Q1p5/1r2P3/1pk2N1p/1R5R/2pPK1p1/2P1P1B1/8

#2

10 + 8

5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Qe7#
  • Tries
    • 1.Kf4?
      • 1...c6
        • 2.Qe7#
      • 1...Kxb4!
    • 1.Sxg3?
      • 1...c6
        • 2.Qe7#
      • 1...Kd6!
    • 1.Sd4?
      • 1...Kxb4
        • 2.Sb3#
      • 1...c6
        • 2.Qe7#
      • 1...Kd6!
    • 1.Sh6?
      • 1...c6
        • 2.Qe7#
      • 1...Kd6!
    • 1.Sg7?
      • 1...c6
        • 2.Qe7#
      • 1...Kd6!
    • 1.Bh1?
      • 1...c6
        • 2.Qe7#
      • 1...g2!
    • 1.Bf3?
      • 1...c6
        • 2.Qe7#
      • 1...g2!
    • 1.Rb1?
      • 1...c6
        • 2.Qe7#
      • 1...b4!
    • 1.Ra4?
      • threat
        • 2.d4#
      • 1...b4
        • 2.Ra5#
      • 1...bxa4!
    • 1.Rbd4?
      • 1...c6
        • 2.Qe7#
      • 1...b4!
    • 1.Rbe4?
      • threat
        • 2.Re5#
      • 1...Kc6
        • 2.Rc4#
        • 2.Re5#
      • 1...Kd5!
    • 1.Rbf4?
      • 1...c6
        • 2.Qe7#
      • 1...b4!
    • 1.Rhd4?
      • 1...c6
        • 2.Qe7#
      • 1...h4!
    • 1.Rhf4?
      • 1...c6
        • 2.Qe7#
      • 1...h4!
    • 1.Rxh5?
      • 1...c6
        • 2.Qe7#
      • 1...Kxb4!
    • 1.Qa5?
      • threat
        • 2.Rbc4#
        • 2.Rhc4#
        • 2.d4#
      • 1...Rd6
        • 2.Rbc4#
        • 2.Rxb5#
        • 2.Rhc4#
        • 2.Qxb5#
      • 1...Rxe6+!
    • 1.Qxc7+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Sxc7!
  • Keys
    • 1.Ke4!
      • 1...Kxb4
        • 2.Kd5#
      • 1...Kc6
        • 2.Kd4#
      • 1...c6
        • 2.Qe7#

Anticipated by 44977(0000)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);OGATE::QAB(J)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT,XR(F)
    • Try
      • S(H);XP(b)
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT
    • Try
      • S(H);
      • Vars
        • K(d);N_SPINR(f),S_FLIGHT,XR(F)::R(G)+S(H)
        • P(g);OGATE::QAB(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT
    • Try
      • S(H);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT
    • Try
      • S(H);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(c);
    • Try
      • R(F);
      • Threat
        • P(D)
      • Vars
        • P(c);OGATEB::R(F)
      • Refutation
        • P(c);XR(F)
    • Try
      • R(F);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(c);
    • Try
      • R(F);
      • Threat
        • R(F)
      • Refutation
        • K(d);N_SPINR(f),P-FLIGHT
    • Try
      • R(F);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(c);
    • Try
      • R(G);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(e);
    • Try
      • R(G);
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • P(e);
    • Try
      • R(G);XP(e)
      • Vars
        • P(g);OGATE::QAB(J)
      • Refutation
        • K(d);N_SPINR(f),S_FLIGHT,XR(F)
    • Try
      • Q(J);N_PINR(f),P_PINP(c)
      • Threat
        • DUALS(3)
      • Refutation
        • R(f);CHECK,XP(I)
    • Try
      • Q(J);CHECK,N_PINR(f),XP(g)
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(J),XR(f)
      • Refutation
        • S(h);XQ(J)
  • Actual
    • K(E);P-FLIGHT
    • Vars
      • K(d);N_SPINR(f),S_FLIGHT,XR(F)::R(G)+K(E)
      • K(d);N_SPINR(f),P-FLIGHT::B(C)+K(E)
      • P(g);OGATE,SBLOCK::QAB(J)
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