MESON Chess Problem Database

Problem Display
PID: 244428 (b2R4/2pnQ3/1N1q2p1/1pR4r/1B1k1P1n/K3N2r/4PP2/1B4b1 w - - 0 1)

Eerkes, Allard Pieter

Revista Romana de Sah, 1934

b2R4/2pnQ3/1N1q2p1/1pR4r/1B1k1P1n/K3N2r/4PP2/1B4b1

#2

11 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Bc3#
    • 1...Qe5
      • 2.Bc3#
    • 1...Qd5
      • 2.Bc3#
    • 1...Qxb6
      • 2.Bc3#
    • 1...Qc6
      • 2.Bc3#
    • 1...Qe6
      • 2.Bc3#
    • 1...Qf6
      • 2.Bc3#
    • 1...Rh1
      • 2.Sc2#
    • 1...Rh2
      • 2.Sc2#
    • 1...Rxe3+
      • 2.Qxe3#
    • 1...Rd5
      • 2.Qe4#
    • 1...Bf3
      • 2.Sc2#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sf3
      • 2.Sc2#
    • 1...c6
      • 2.Qe4#
  • Tries
    • 1.Qxd6+?
      • 1...Rd5
        • 2.Bc3#
      • 1...Bd5
        • 2.Bc3#
      • 1...cxd6!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Rd1#
      • 1...Qxb4+
        • 2.Qxb4#
      • 1...Rxe3+
        • 2.Qxe3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sf3
        • 2.Sc2#
      • 1...Sc5
        • 2.Bc3#
      • 1...Se5
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(g);P_SPINS(j),XP(G)::B(F)
    • Q(g);P_SPINS(j)::B(F)
    • Q(g);::B(F)
    • Q(g);P_SPINS(j),XS(I)::B(F)
    • R(b);N_PINS(E)::S(E)
    • R(b);CHECK,OGATE,XS(E)::QAB1(J),XR(b)
    • R(f);S_CUTB(k)::QAR1(J)
    • B(k);N_PINS(E)::S(E)
    • B(k);N_GUARD::QAR1(J),XB(k)
    • S(d);N_PINS(E)::S(E)
    • P(i);S_CUTB(k)::QAR1(J)
  • Tries
    • Try
      • Q(J);CHECK,XQ(g)
      • Vars
        • R(f);P_SPINR(f)::B(F)
        • B(k);P_SPINB(k)::B(F)
      • Refutation
        • P(i);XQ(J)
  • Actual
    • R(H);P_SPINB(F)
    • Threat
      • R(H)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINS(j),XB(F)::QAR2(J),XQ(g)
      • R(b);CHECK,OGATE,XS(E)::QAB1(J),XR(b)
      • B(k);N_GUARD::QAR1(J),XB(k)
      • S(d);N_PINS(E)::S(E)
      • S(j);N_PINB(F),P_SPINQ(g),SBLOCK::B(F)
      • S(j);N_GUARD,P_SPINQ(g),S_CUTR(f)::B(F)
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