MESON Chess Problem Database

Problem Display
PID: 238917 (7r/1p5B/b2pQ3/B2p4/1PkP2R1/R3p2N/4K1Np/4n1b1 w - - 0 1)

Petite, Efren

Il Due Mosse, 1962

7r/1p5B/b2pQ3/B2p4/1PkP2R1/R3p2N/4K1Np/4n1b1

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qxd5#
    • 1...Sc2
      • 2.Bd3#
    • 1...Sxg2
      • 2.Bd3#
    • 1...Sd3
      • 2.Bxd3#
    • 1...Sf3
      • 2.Bd3#
  • Tries
    • 1.Sxe1?
      • threat
        • 2.Bd3#
      • 1...Kb5
        • 2.Qxd5#
      • 1...Rxh7!
    • 1.Sxe3+?
      • 1...Kb5
        • 2.Qxd5#
        • 2.Qd7#
      • 1...Bxe3!
    • 1.Be4?
      • threat
        • 2.Qxd5#
      • 1...Kxd4+
        • 2.Bd3#
      • 1...Kb5
        • 2.Qxd5#
      • 1...Rh5!
    • 1.Rc3+?
      • 1...Kb5
        • 2.Qd7#
      • 1...Kxc3+!
    • 1.Rg5?
      • threat
        • 2.Qxd5#
      • 1...Kb5
        • 2.Qxd5#
      • 1...Kxd4+!
    • 1.Qxd6?
      • threat
        • 2.Qc5#
      • 1...Kb5
        • 2.Qc5#
        • 2.Qxd5#
      • 1...Sd3
        • 2.Bxd3#
      • 1...b6
        • 2.Qc6#
      • 1...Rc8!
  • Keys
    • 1.Shf4!
      • threat
        • 2.Qxd5#
      • 1...Kxd4+
        • 2.Sd3#
      • 1...Kb5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(e);N_SPINP(f),S_FLIGHT::QAR2(I),XP(f)
    • S(a);N_GUARD::B(J)
    • S(a);N_GUARD,XS(B)::B(J)
    • S(a);N_GUARD::B(J),XS(a)
  • Tries
    • Try
      • S(B);XS(a)
      • Threat
        • B(J)
      • Vars
        • K(e);N_SPINP(f),S_FLIGHT::QAR2(I),XP(f)
      • Refutation
        • R(j);XB(J)
    • Try
      • S(B);CHECK,XP(d)
      • Refutation
        • B(b);XS(B)
    • Try
      • B(J);
      • Threat
        • QAB1(I),XP(f)
      • Vars
        • K(e);CHECK,N_SPINP(f),P-FLIGHT,XP(F)::R(G)+B(J)
        • K(e);N_SPINP(f),S_FLIGHT::QAR2(I),XP(f)
      • Refutation
        • R(j);
    • Try
      • R(C);CHECK
      • Vars
        • K(e);N_SPINP(f),S_FLIGHT::QAB(I)
      • Refutation
        • K(e);CHECK,N_SPINP(f),P-FLIGHT,XR(C)
    • Try
      • R(G);
      • Threat
        • QAB1(I),XP(f)
      • Vars
        • K(e);S_FLIGHT::QAR2(I),XP(f)
      • Refutation
        • K(e);CHECK,N_SPINP(f),P-FLIGHT,XP(F)
    • Try
      • Q(I);N_PINP(f),XP(h)
      • Threat
        • QAR1(I)
      • Vars
        • S(a);N_GUARD::B(J),XS(a)
        • P(i);N_GUARD::QAR2(I)
      • Refutation
        • R(j);
  • Actual
    • S(D);
    • Threat
      • QAB1(I),XP(f)
    • Vars
      • K(e);CHECK,N_SPINP(f),P-FLIGHT,XP(F)::R(G)+S(D)
      • K(e);N_SPINP(f),S_FLIGHT::QAR2(I),XP(f)
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